Write an assembly program to print a single character

If the user fails to enter a hex digit character in three tries, display a message and terminate the program. An Assembly Language Program that reads a two characters compare them and prints the smallest character Simulation of If-Else structure. An Assembly Language Program to print counting from 0 to 9. An Assembly Language Program to read one of the hex digits A-F and display it on the next line in decimal. An Assembly Language Program that prompt the user read first middle and last initials of a persons name display them down the left margin.

An Assembly Language Program to read a character and display it on new line with user prompts initialized by constants. An Assembly Language Program to read a letter in lower case and print it after converting it in to Upper case.

An Assembly Language Program to read two digits such that second digit is less than the first digit computes and display their difference using Variables. An Assembly Language Program to read two digits whose sum is less than 0 computes and display their sum using variables. An Assembly Language Program to read two digits such that second digit is less than the first digit computes and display their difference without using variables. An Assembly Language Program to read two digits whose sum is less than 0 computes and display their sum without using variables.

The easiest way I know of is to push your character on the stack. Sure, you can use any normal C function. Here's a NASM example that uses printf to print some output:. If you only want to print a single character, you could use putchar :. Calling putchar 3 is the simplest way. Just move the char's value into the rdi register for x, or edi for x86 , and call putchar.

How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Printing a character to standard output in Assembly x86 Ask Question. Asked 10 years, 1 month ago. Active 3 years, 6 months ago.

Viewed 35k times. Add a comment. Active Oldest Votes. In the interest of completeness, here is how to do it without C. I haven't tested this myself. BrainSlugs83 I don't know about Windows, sorry. Maybe Peter Cordes can shed some light. BrainSlugs Windows has a system-call ABI you can in theory use from user-space, but it's undocumented and not stable across versions.

Still, see github. I don't know which one s you'd actually want to use. Here's a NASM example that uses printf to print some output: ; ; assemble and link with: ; nasm -f elf test. Martin Martin But what if register ebx holds the value 8, and I want to print the character '8'.

If I try and push ebx as the parameter it doesn't work so is there a way around this? Cheers — user Bailey Parker 15k 4 4 gold badges 51 51 silver badges 84 84 bronze badges.