#include <stdio.h>
#include <stdlib.h>

/*
https://www.tutorialspoint.com/cprogramming/c_input_output.htm
*/

int main()
{
    int a,b;

    printf( "keyboard type a number for 'a' :");
    scanf("%d", &a);

    printf( "keyboard type a number for 'b' :");
    scanf("%d", &b);

    printf( "\nYou entered: a = %d , b = %d",  a,b);
    printf( ", a + b = %d ",  a + b); // now we try to calculate something

    return 0;
}