func_code_string: #include <bits/stdc++.h>   using namespace std;   int main(void) {     int x1, y1, x2, y2;     scanf( %d%d%d%d , &x1, &y1, &x2, &y2);     int res = abs(x1 - x2) + 1 + (x1 == x2);     res += abs(y1 - y2) + 1 + (y1 == y2);     printf( %d n , res * 2);   }   