work.c #1

#include <stdio.h>
#include <string.h>
#include <stdbool.h>

bool at_work(const char *yes)
{
    return strcmp(yes, "yes") == 0;
}

void work(bool yes)
{
    if (yes)
        puts("I'm working");
    else
        puts("I'm \"working\"");
}

int main(int argc, const char *argv[])
{
    if (at_work(argv[1])) work(true); else work(false);
    return 0;
}