Why is this wrong, can someone make a right for me.

distance.cpp 1 #include 2 #include 3 4 using namespace std; 5 6 int main() 7 { 8 // Other values will be set during testing. 9 // Your program needs to work with any coordinates. 10 11 int h1; 12 int v1; 13 int h2; 14 int v2; 15 int distance = abs(h2-h1) + abs(v2-v1); 16 cout