func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 8;   int main() {     char r1, r2;     int x1, x2;     while (4 == scanf(  %c%d %c%d , &r1, &x1, &r2, &x2)) {       int y1 = r1 -  a ;       int y2 = r2 -  a ;       --x1;       --x2;       int ans = 0;       for (int y = 0; y < (int)(N); y++)         for (int x = 0; x < (int)(N); x++) {           if (y1 == y || x1 == x) continue;           int dx1 = abs(x1 - x), dy1 = abs(y1 - y);           int dx2 = abs(x2 - x), dy2 = abs(y2 - y);           if (dx1 > dy1) swap(dx1, dy1);           if (dx2 > dy2) swap(dx2, dy2);           if (dx1 == 1 && dy1 == 2) continue;           if (dx2 == 1 && dy2 == 2) continue;           if (dx2 == 0 && dy2 == 0) continue;           ++ans;         }       printf( %d n , ans);     }     return 0;   }   