square(int x)1 int square(int x) 2 { 3 return x * x; 4 } 5 main(int argc,char const * argv[])6 int main (int argc, char const *argv[]) 7 { 8 int did_call = 0; 9 10 // Line 11. v Column 50. 11 if(square(argc+1) != 0) { did_call = 1; return square(argc); } 12 // ^ 13 return square(0); 14 } 15