func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:16777216 )   #pragma warning(disable : 4996)   using namespace std;   int main() {     int Lpos1, Lpos2;     bool p[9][9];     memset(p, true, sizeof(p));     for (int i = 0; i < 2; i++) {       char k[3];       scanf( %s , &k);       int pos1 = k[0] -  a  + 1;       int pos2 = k[1] -  0 ;       if (i == 0) {         Lpos1 = pos1;         Lpos2 = pos2;         for (int j = pos1; j >= 1; j--) p[j][pos2] = false;         for (int j = pos1; j <= 8; j++) p[j][pos2] = false;         for (int j = pos2; j >= 1; j--) p[pos1][j] = false;         for (int j = pos2; j <= 8; j++) p[pos1][j] = false;       } else {         int x = pos1, y = pos2;         p[x][y] = false;         if (x + 1 <= 8 && y + 2 <= 8) p[x + 1][y + 2] = false;         if (x - 1 >= 1 && y + 2 <= 8) p[x - 1][y + 2] = false;         if (x - 2 >= 1 && y + 1 <= 8) p[x - 2][y + 1] = false;         if (x - 2 >= 1 && y - 1 >= 1) p[x - 2][y - 1] = false;         if (x - 1 >= 1 && y - 2 >= 1) p[x - 1][y - 2] = false;         if (x + 1 <= 8 && y - 2 >= 1) p[x + 1][y - 2] = false;         if (x + 2 <= 8 && y - 1 >= 1) p[x + 2][y - 1] = false;         if (x + 2 <= 8 && y + 1 <= 8) p[x + 2][y + 1] = false;       }     }     int x = Lpos1, y = Lpos2;     if (x + 1 <= 8 && y + 2 <= 8) p[x + 1][y + 2] = false;     if (x - 1 >= 1 && y + 2 <= 8) p[x - 1][y + 2] = false;     if (x - 2 >= 1 && y + 1 <= 8) p[x - 2][y + 1] = false;     if (x - 2 >= 1 && y - 1 >= 1) p[x - 2][y - 1] = false;     if (x - 1 >= 1 && y - 2 >= 1) p[x - 1][y - 2] = false;     if (x + 1 <= 8 && y - 2 >= 1) p[x + 1][y - 2] = false;     if (x + 2 <= 8 && y - 1 >= 1) p[x + 2][y - 1] = false;     if (x + 2 <= 8 && y + 1 <= 8) p[x + 2][y + 1] = false;     int d = 0;     for (int i = 1; i <= 8; i++)       for (int j = 1; j <= 8; j++)         if (p[i][j]) d++;     printf( %d , d);     return 0;   }   