Question

I’m practicing C programming for Linux for an exam.
I don’t know how to exit the program when user press Ctrl + a ( not Ctrl+c )
For example, looping something until user press Ctrl+a
Could anyone tell me how to check Ctrl+a input?

Notes: I’m using ‘gcc’ and run output with ‘./a.out’

Thanks in advance for everyone!

Answer 1

did you looking for something like this ???
this program won’t be stopped since you hit ctrl+A and Enter.

#include <stdio.h>

int main() {
    char a;
    while( a!=1 ) //Ascii code for ctrl + A == 1
    {
        a=getchar();
        printf("still looping ...\n");
    }
    printf( "HA! You pressed CTRL+A\n" );
    return 0;
}

But if you wanna terminate your program just after pressing ctrl+A (without hitting enter after that), here you are:

#include <stdio.h>
#include <ncurses.h>

int main() {
    char a;
    initscr();
    raw();

    while( a!=1 )
        a=getch();

    endwin();
    return 0;
}

for compiling second code using GCC, try this command:

gcc -o program.o -lncurses program.cpp