how to take input from user in assembly language

One can also show message in the console window to tell the user, what to input in the program. Some notes about the code: - You are too paranoid and using too many PUSHs and POPs. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. Connect and share knowledge within a single location that is structured and easy to search. Otherwise total path of the file need to defined inside the scan() method. ][1,DZ%x7) Asking for help, clarification, or responding to other answers. How to take an input and show the output in assembly language using emu8086. 196 subscribers Hi guys In this video I will tell you how to get input from User and perform sum operation on in while using Visual Studio with Linker Settings. Then I want to process it, I already know how to process the number, but only when I've already declared the number in the variable ( Y dw 123), but since I have to ask the user for an input, I have to leave the variable uninitialized ( Y dw ?). How to take input in assembly language? The following commentary covers new information which is of interest in reading Program 2-2. For String one doesnt need to convert the inputted data into a string because R takes input as string always. The second thing to note in this figure is that the letters are stored backwards each grouping of 4 bytes, or a memory word. The value is displayed in the Log window. The language to command a computer architecture is comprised of instructions and the vocabulary of that language is called the instruction set. So far my code is, It prompts the user for their name but as soon as you type one character the code blows up. Do I need a thermal expansion tank if I already have a pressure tank? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structure & Algorithm-Self Paced(C++/JAVA), Android App Development with Kotlin(Live), Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Interesting Facts about R Programming Language. INPUT: Takes the users input and stores it in the AC. Also I was wondering how I would take out the leading 0s. i am using MASM 611 assembly language software. I wrote a program that just takes an input from the user and then writes his input to stdout. By using our site, you The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. If your OS runs in 8086 Real Mode, you can ask the BIOS for these, otherwise you need to do direct port I/O. If you want to program the BIOS, check the RBIL. Code: Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Why do small African island nations perform better than African continental nations, considering democracy and human development? How to PRINT INPUT and output in Assembly? Introduction To MIPS Assembly Language Programming (Kann), { "2.01:_The_MARS_IDE" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.02:_MIPS_and_Memory" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.03:_First_Program_in_MIPS_Assembly" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.04:_Program_to_Prompt_and_Read_an_Integer_from_a_User" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.05:_Program_to_Prompt_and_Read_a_String_from_a_User" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.06:_Summary" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.07:_Java_Program_for_Call_by_Value_and_Reference" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.08:_Exercises" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, { "00:_Front_Matter" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "01:_Introduction" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "02:_First_Programs_in_MIPS_Assembly" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "03:_MIPS_Arithmetic_and_Logical_Operators" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "04:_Translating_Assembly_Language_into_Machine_Code" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "05:_Simple_MIPS_Subprograms" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "06:_MIPS_Memory_-_the_Data_Segment" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "07:_Assembly_Language_Program_Control_Structures" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "08:_Reentrant_Subprograms" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "09:_Arrays" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "zz:_Back_Matter" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, 2.5: Program to Prompt and Read a String from a User, [ "article:topic", "license:ccby", "showtoc:no", "authorname:ckann", "licenseversion:40" ], https://eng.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Feng.libretexts.org%2FBookshelves%2FComputer_Science%2FProgramming_Languages%2FIntroduction_To_MIPS_Assembly_Language_Programming_(Kann)%2F02%253A_First_Programs_in_MIPS_Assembly%2F2.05%253A_Program_to_Prompt_and_Read_a_String_from_a_User, $ \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}$ $ \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} $$\newcommand{\id}{\mathrm{id}}$ $ \newcommand{\Span}{\mathrm{span}}$ $ \newcommand{\kernel}{\mathrm{null}\,}$ $ \newcommand{\range}{\mathrm{range}\,}$ $ \newcommand{\RealPart}{\mathrm{Re}}$ $ \newcommand{\ImaginaryPart}{\mathrm{Im}}$ $ \newcommand{\Argument}{\mathrm{Arg}}$ $ \newcommand{\norm}[1]{\| #1 \|}$ $ \newcommand{\inner}[2]{\langle #1, #2 \rangle}$ $ \newcommand{\Span}{\mathrm{span}}$ $\newcommand{\id}{\mathrm{id}}$ $ \newcommand{\Span}{\mathrm{span}}$ $ \newcommand{\kernel}{\mathrm{null}\,}$ $ \newcommand{\range}{\mathrm{range}\,}$ $ \newcommand{\RealPart}{\mathrm{Re}}$ $ \newcommand{\ImaginaryPart}{\mathrm{Im}}$ $ \newcommand{\Argument}{\mathrm{Arg}}$ $ \newcommand{\norm}[1]{\| #1 \|}$ $ \newcommand{\inner}[2]{\langle #1, #2 \rangle}$ $ \newcommand{\Span}{\mathrm{span}}$$\newcommand{\AA}{\unicode[.8,0]{x212B}}$, 2.4: Program to Prompt and Read an Integer from a User, status page at https://status.libretexts.org, There was two new assembler directives introduced in this program. If you continue to use this site we will assume that you are happy with it. Note that the size is 1 less than the number of characters available to account for the null terminator. In this program, blocks of code are commented, not each individual statement. If one inputs an integer then it is inputted as a string, lets say, one wants to input 255, then it will input as 255, like a string. Most programs today use a dialog box as a way of asking the user to provide some type of input. Connect and share knowledge within a single location that is structured and easy to search. Am I doing this experiment correctly? To learn more, see our tips on writing great answers. rev2023.3.3.43278. Simple input and output in assembly x86_64, How Intuit democratizes AI development across teams through reusability. Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? Not the answer you're looking for? Try looking at this thread, showing code examples in C, the one that's mentioned as slight optimization: Assembly Language x8086 - Getting User input, How Intuit democratizes AI development across teams through reusability. The next program that will be studied prompts a user to input a number, then reads that number into a register and prints it back to the user. Heaven's Light 752 subscribers Subscribe 27K views 2 years ago Hello friends.From this tutorial you can learn. Learn more about Stack Overflow the company, and our products. You have to pass two arguments: $a0 = address of input buffer $a1 = maximum number of characters to read So you should do something like: la $a0, name li $a1, 20 Nevertheless, this shouldn't cause a crash since $a0 should still hold the address of firstPromptString that you set up for the printing, earlier, and that is valid writable memory. How to prove that the supernatural or paranormal doesn't exist? Is it correct to use "the" before "materials used in making buildings are"? On the next line, display the capital letter entered that comes first alphabetically and the one that comes last, If no capital letters are entered, display "No Capital Letters" Assembly Language Programming 5,741 Views This corresponds to the concept of pass-by-value in a language like Java. How do I align things in the following tabular environment? To start writing your program. Without the xchg, you need a third register, and dx is affected by the multiply, so you could use: mov si,ax mov ax,bx mul cx mov bx,ax add bx,si . I havent used emu8086, just NASM and gas. We already know the answer. Developers often have a need to interact with users, either to get data or to provide some sort of result. I've tried all kinds of ways and wasted many hours getting more confused. I'd like to know if there is an interrupt I can call and it will wait until a key is pressed, then read it from the keyboard buffer. Procedure Invoke the assembler with the command-line options you want to use. I'm trying to write a program in MIPS assembly that simply prompts a user for their name and then prints their name back to them. Syntax:x = scan(fileDouble.txt, what = double()) -for doublex = scan(fileString.txt, what = ) -for stringx = scan(fileChar.txt, what = character()) -for character. Use MathJax to format equations. That won't input an integer - it inputs a string of characters. The best answers are voted up and rise to the top, Not the answer you're looking for? Why are trials on "Law & Order" in the New York Supreme Court? Many HLL, like C and C++7 , use this definition of a string. Store memory location 3050 in M using LXI instruction and take another register say C with its value 00. LOAD X: Loads the value stored in X to the AC. rev2023.3.3.43278. But this parameter passing mechanism is commonly called pass-by-reference in Java, and the difference between the two is beyond what can be explained in assembly at this point. Also, how would I go about removing the leading zeros such as if the Sum is 43, but it prints out 0043, I tried to look through my book to find hints, but no luck. i want to add two numbers input from users. - August 15, 2020 .model small .data message1 db "Enter any string:$" message2 db "Given string is:$" str1 db 100 dup ('$') .code mov ax,@data mov ds,ax mov ah,09h mov dx,offset message1 int 21h mov si,offset str1 up: mov ah,1 int 21h Legal. If your OS runs in 8086 Real Mode, you can ask the BIOS for these, otherwise you need to do direct port I/O. Minimising the environmental effects of my dyson brain, ERROR: CREATE MATERIALIZED VIEW WITH DATA cannot be executed from a function. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. +%hC<=do] sMiHh\uu8"4`;Rq j@@TCkH0IO|2}}3Z{o-[QA4c`\V=o`pr'&R.ZTqIJS?QP~V^AOkIuj\F_gH5~do H\`aO5hA[7VH+bJ@ Assembly Tutorial 6 - Getting User Input kupala 7.7K subscribers Subscribe 138 55K views 11 years ago ASSEMBLY TUTORIAL 7: http://www.youtube.com/watch?v=yuuwyk. Load input number address in SI and also load the address where we want output in DI . Service 1 prints out the integer value in register. This topic of value and reference types will be covered in much greater details in the chapters on subprograms and arrays. How do I connect these two faces together? Does Counterspell prevent from any further spells being cast on a given turn? @mirabilos : The BIOS keyboard buffer is effectively 15 bytes. mov rax, SYS_EXIT mov rsi, 0 ; successful exit syscall The first parameter goes in the RDI register instead of RSI. There are also three elements involved in performing character input: 1.As for character output, we specify which of MS-DOS's I/O subprograms we wish to use, i.e. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. ; declare array with null value initially .CODE MAIN PROC MOV AX,@DATA MOV DS,AX What is array? Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs, mov ah,01h int16h, how to use it to change the direction of the snake, Snake Assembly 8086: not moving correctly, Can't bind to 'ngModel' since it isn't a known property of 'input'. You as a programmer just have to realize what type of format is used, and adjust how you interpret the characters appropriately. Does a summoned creature play immediately after being summoned by a ready action? Load the value of input in accumulator from memory location 2050 and then copy it to another register say D.Also store 0A in register B. Explanation: Create a string Load the effective address of the string in dx using LEA command Print the string by calling the interrupt with 9H in AH The string must be terminated by '$' sign Program .MODEL SMALL .STACK 100H .DATA ;The string to be printed STRING DB 'This is a sample string', '$' .CODE MAIN PROC FAR MOV AX,@DATA MOV DS,AX Exporting Data from scripts in R Programming, Working with Excel Files in R Programming, Calculate the Average, Variance and Standard Deviation in R Programming, Covariance and Correlation in R Programming, Setting up Environment for Machine Learning with R Programming, Supervised and Unsupervised Learning in R Programming, Regression and its Types in R Programming. There is no mechanism to change this in MARS, and no programmatic way to handle this in our programs. But prompt is not mandatory to use all the time. But if youre not in Real Mode, there is no keyboard buffer to begin with. Best to only show the characters that were effectively inputted. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. In his figure there are 8 bytes containing the characters "cuhC \0\0\nk". It also has a 15- or 16-byte input buffer. Why does C++ code for testing the Collatz conjecture run faster than hand-written assembly? Thanks! This we will equate to the concept of pass-by-reference6 in a language like Java. This is an annoyance which we will be stuck with until strings are covered at the end of this text. Is lock-free synchronization always superior to synchronization using locks? stream In This Video We Learn How to Input Two Number and Add Them in Assembly Language Step by Step with Easy Example Assembly Language Programming Tutorial Full Play Listhttps://www.youtube.com/watch?v=7xiPJVPzcGM\u0026list=PLduM7bkxBdOczQDpzp3R9ieJRpjtZrcxj---------------------------------------------------------------------------- Object Oriented Programming C++https://www.youtube.com/watch?v=HcgLqP-5vMo\u0026list=PLduM7bkxBdOekXfkEqIBAivzG99V2LrASC++ Programminghttps://www.youtube.com/watch?v=fwssJKaJjeM\u0026list=PLduM7bkxBdOeSDRyDC0T3PvBJ9KwPqvbVData Structure and Algorithms using C++https://www.youtube.com/watch?v=opnKF5mEDTQ\u0026list=PLduM7bkxBdOfrkeXwUQBYl3dKwclDjXcdCompiler Constructionhttps://www.youtube.com/watch?v=lO3Z8aXaDgk\u0026list=PLduM7bkxBdOdTE36EZE977HU11DUJCxHiDistributed Database Systemshttps://www.youtube.com/watch?v=RKmK_vKZsq8\u0026list=PLduM7bkxBdOdjbMXkTRdsSlWQKR43nSmdTheory of Automata and Formal Languageshttps://www.youtube.com/watch?v=pZ2U3Pl4DNA\u0026list=PLduM7bkxBdOckkPOjexEV8KKCjqYh1T_3Database Management Systemhttps://www.youtube.com/watch?v=JJVIXx17Asc\u0026list=PLduM7bkxBdOfe0uExLrwscrIW1rT6nDy-C Language https://www.youtube.com/watch?v=pCVfSMuHRWY\u0026list=PLduM7bkxBdOdzWSEZ7kUeMWg5h2x2kRviPython Tutorial for Beginnershttps://www.youtube.com/watch?v=tC-TaKkWr08\u0026list=PLduM7bkxBdOfcEyG-E-SesjcbnO1GSzkeSQL with Microsoft Accesshttps://www.youtube.com/watch?v=g443tbg19Mk\u0026list=PLduM7bkxBdOczEgWcy50PbHhoFKgaXbDSHTML Tutorial for Beginnershttps://www.youtube.com/watch?v=--bAOMJBayQ\u0026list=PLduM7bkxBdOdILF4qDCaz_PTUv_0NoA-GPHP Beginner Tutorialhttps://www.youtube.com/watch?v=aiEz1orkva0\u0026list=PLduM7bkxBdOf3jc82im70nedEalse2omHNumber Systemhttps://www.youtube.com/watch?v=1pt_FHnEp3I\u0026list=PLduM7bkxBdOd85vOyZAK71FTXX_qYrVsd----------------------------------------------------------------------------------------------------------------------How to Input Two Number and Add Them in Assembly LanguageHow to input two numbers in assembly languageAssembly language program to add two numbersAssembly program to add two numbersHow to input a number in assembly languageAssembly program to input a numberHow to take input from user in assembly languageProgram to take input from user in assembly languageAssembly program to take input from keywordAdd Two Numbers in Assembly Language 8086How to add two numbers in 8086 microprocessorHow to add two numbers in 8086Addition of two numbers in 8086 assembly languageAdd two numbers in assembly language program 8086Assembly language 8086 adding two numbersassembly language programmingassembly languageassembly language tutorialcomputer organization and assembly languageAssembly language tutorialAssembly language tutorial in urdu Assembly language tutorial hindi Assembly programming tutorial Assembly programming tutorial in urdu Assembly programming tutorial in hindi Learn Assembly language Learn Assembly language in urdu Learn Assembly language in hindi Learn Assembly language programing Learn Assembly language programing in urdu Learn Assembly language programing in hindi Assembly language vu Assembly language vu student Assembly language programming tutorial Assembly language programming tutorial in urdu Assembly language programming tutorial in hindi Best tutorials for assembly language Best tutorial for assembly language programming Assembly language introduction Assembly language intro Assembly programming Assembly programming in urdu Assembly programming in hindi assembly language computer architecture assembly language computer architecture in urdu assembly language computer architecture in hindiassembly language programming tutorial 8086 assembly language programming tutorial 8086 in urdu assembly language programming tutorial 8086 in hindi assembly language computer architecture assembly language computer architecture in urdu assembly language computer architecture in hindi assembly language programming tutorials assembly language programming tutorials in urdu assembly language programming tutorials in hindi Why we study assembly language?#InputTwoNumber#InputTwoNumberAddThemAssemblyLanguage#AddTwoNumbersAssemblyLanguage8086 lN,7|sB EKi?I[a}%4+oi hxSu[(i-X5EBy(nSDT&3?jeh4T~0# This will improve readability. Note that the memory circled in red is the space which was saved for the input string, and it is all null values. w\_>In&7Pg/:kqgtX>z4U}YGj0R|W\5kAG0?Lb7DoBE|8']$)J}<1mGgnE;t$5>, If one inputs an integer then it is inputted as a string, lets say, one wants to input 255, then it will input as "255", like a string. ncdu: What's going on with this second size column? An Assembly Language Program that prompts a user to enter a line of text. How to prove that the supernatural or paranormal doesn't exist? How to input 2 digit number in Assembly emu8086? I am stuck on a problem I have for a homework assignment that is asking me to ask the user fora digit ranging from 1 digit to 5 digits (eg. Write a program that computes the following: Y = (Get user input) Y= Y-1 Sum = 36 + Y + (Y/4) + (Y/100) W = Sum % 7 + 1 Output W, Sum Note: You may not use any library functions If my question is still unclear please tell me so I may attempt to ask my question clearly so what others may understand. Thanks for contributing an answer to Stack Overflow! The memory for the input string has been changed to store the value "Chuck", as shown in the circled text in the figure below (be sure to select the ASCII checkbox, or the values will show up in hex). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. I need to be able to get an integer input from the keyboard (user) within the range of 0-255. This is a common format in computer hardware referred to as little endian. 8086 Assembly Language For Absolute Beginner What is 8086 Assembly Language 8086 first program you should write as a beginner Hello World Application 8086 Interrupts INT 10h Video Interrupt INT 16h Keyboard Interrupt INT 21h Dos Interrupt INT 33h Mouse Interrupt Frequently Used Instruction Set MOV INC DEC CMP JMP JC JE JL JNC JNE LOOP ADD SUB MUL What if the user didn't input that much characters? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, How Intuit democratizes AI development across teams through reusability. Any help or advice would be greatly appreciated Then call an interrupt to happen this.Generally call INT 21H for input and output. What is the input and output of assembler? A new operator was introduced in this program, the, Two new syscall services have been introduced. Thanks for contributing an answer to Code Review Stack Exchange! Chapter 1 Assembler Input The IA-32 Assembler translates source files in the assembly language format specified in this document into relocatable object files for processing by the link editor. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, INT 13, 2 hanging on x86 real mode when trying to read sectors from floppy drive, unable to read from file when user provides filename (x86 assembly program using nasm), Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs. To take double, string, character types inputs, specify the type of the inputted value in the scan() method. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 3.3.2 Character Input The task here is to read a single character from the keyboard. ", "Y dw 0,0,0,0,0", I did this so that I can manual store enter number into that Y variable. This method takes input from the console. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. DB = define byte size variables. Creation and Execution of R File in R Studio, Clear the Console and the Environment in R Studio, Print the Argument to the Screen in R Programming print() Function, Decision Making in R Programming if, if-else, if-else-if ladder, nested if-else, and switch, Working with Binary Files in R Programming, Grid and Lattice Packages in R Programming. This shows that the $a0 parameter to service 8 was actually a memory reference, and the service updated the memory directly. x[KoHcx:~w3@fk`/cscQIed"+A0 |w}UJ!T1"i~m\Rh;7;[v?~>]6]yQF}b^/WVK ZHv3-O Gk^/-~_>BH\/$Bf+[yLr8]iO~SNlUESm]a2$nC Cd#Y ) Y"EA4)sJFGG!uS39=DRXtBnx)Z|+_E4eYA6VkH0hD)cZB>*v`.EIs4q:ZoW \h!24r fMBi&K;+gU swTI.7ig^[e^v@fp0\0~TkZ{!N`!-|8Ae})cIolP#baFJ"Z.0Rk0njStQC^Kz&0my>$d)@]\^sqVC{(=c?MX+wRl-! But, as I said, it only works in 8086 Real Mode. (And break for everything else). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Making statements based on opinion; back them up with references or personal experience. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. There should not be a need to comment each line, as a programmer should generally be able to understand the individual instructions. How to get input string from user in assembly language. Time arrow with "current position" evolving with overlay number. We call MS-DOS to carry out the I/O operation using the int instruction as for character input. To read file using scan() method is same as normal console input, only thing is that, one needs to pass the file name and data type to the scan() method. The following commentary covers new information which is of interest in reading Program 2-3. Making statements based on opinion; back them up with references or personal experience. 3 How do you display variables in assembler?