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  1. #include <iostream>
  2.  
  3. int main()
  4. {
  5.     setlocale(LC_ALL, "Rus");
  6.  
  7.     int m[3][3] = {{2,7,6},{9,5,1},{4,3,8}};
  8.  
  9.     bool res = true;
  10.  
  11.     int sd1 = 0, sd2 = 0, s;
  12.  
  13.     for(int i = 0; i < 3; i++)
  14.     {
  15.         sd1 += m[i][i];
  16.         sd2 += m[i][3 - i - 1];
  17.     }
  18.     if(sd1 != sd2) res = false;
  19.     else
  20.     {
  21.         for(int i = 0; i < 3; i++)
  22.         {
  23.             s = 0;
  24.             for(int j = 0; j < 3; j++)
  25.             {
  26.                 s += m[i][j];
  27.             }
  28.             if(s != sd1)
  29.             {
  30.                 res = false;
  31.                 break;
  32.             }
  33.         }
  34.         if(res)
  35.             for(int j = 0; j < 3; j++)
  36.             {
  37.                 s = 0;
  38.                 for(int i = 0; i < 3; i++)
  39.                 {
  40.                     s += m[i][j];
  41.                 }
  42.                 if(s != sd1)
  43.                 {
  44.                     res = false;
  45.                     break;
  46.                 }
  47.             }
  48.     }
  49.     if(res) std::cout << "Да." << std::endl;
  50.     else std::cout << "Нет." << std::endl;
  51.  
  52.     return 0;
  53. }
Success #stdin #stdout 0s 5048KB
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Да.
https://ideone.com/VWlXzd
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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