#include <cstdio>

int your_function(int a, int b)
{
  return a - b;
}

int main(void)
{
    int i = 10;

    //printf + function call expression
    printf("%d - %d - %d\n", i, your_function(++i, ++i), i);
    //nested function calls to custom function:
    //you may expect 12 - (12 - 13) = 12 - (-1) = 13
    printf("%d\n", your_function(i, your_function(i++, i)));
    return 0;
}