Seriously, he said the next question was string manipulation or something:

    #include <stdio.h>
    char f[8] = {70, 117, 99, 107, 32, 121, 111, 117};
    int main(){
      int u; for(u=0; u<8; u++) { printf("%c", f[u]); }
      printf(".\n");
    }

Thank them for their time and walk out.