Small C snippet to get ascii code on keypress (for Unix systems)

get_ascii_code.c

#include <stdio.h>
#include <termios.h>
#include <unistd.h>

// from https://stackoverflow.com/a/17271636/2904315
#define clear() printf("\033[H\033[J")

// emulate getch() of conio.h
int getch() {
    // from http://stackoverflow.com/a/23035044/15472
    struct termios oldattr, newattr;
    int ch;
    tcgetattr( STDIN_FILENO, &oldattr );
    newattr = oldattr;
    newattr.c_lflag &= ~( ICANON | ECHO );
    tcsetattr( STDIN_FILENO, TCSANOW, &newattr );
    ch = getchar();
    tcsetattr( STDIN_FILENO, TCSANOW, &oldattr );
    return ch;
}

int main()
{
    int e = 0;
    while( e != 4 ) { // while no EOT (End Of Transmission signal)
        printf("\n Enter a character : ");
        e=getch();
        if (e==12) { // FF signal, i.e. clear screen
            clear();
        }
        else {
            printf("\n The ASCII value of the character is : %d",e);
        }
    }
    return 0;
}