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  1. #include <stdio.h>
  2.  
  3.  
  4. int is_magic(int *m, size_t size)
  5. {
  6.     int sum = 0;
  7.  
  8.     for(size_t col = 0; col < size; col++)
  9.     {
  10.         sum += m[col];
  11.     }
  12.  
  13.     for(size_t row = 1; row < size; row++)
  14.     {
  15.         int psum = 0;
  16.         for(size_t col = 0; col < size; col++)
  17.         {
  18.             psum += m[col + row * size];
  19.         }
  20.         if(psum != sum) return 0;
  21.     }
  22.  
  23.     for(size_t col = 0; col < size; col++)
  24.     {
  25.         int psum = 0;
  26.         for(size_t row = 0; row < size; row++)
  27.         {
  28.             psum += m[col + row * size];
  29.         }
  30.         if(psum != sum) return 0;
  31.     }
  32.     return 1;
  33. }
  34.  
  35. int m[3][3] = 
  36. {
  37.     {8, 1, 6},
  38.     {3, 5, 7},
  39.     {4, 9, 2},
  40. };
  41.  
  42. int m1[3][3] = 
  43. {
  44.     {8, 1, 6},
  45.     {3, 9, 7},
  46.     {4, 9, 2},
  47. };
  48.  
  49.  
  50. int main()
  51. {
  52.     printf("%d\n", is_magic(m,3));
  53.     printf("%d\n", is_magic(m1,3));
  54.  
  55.     return 0;
  56. }
  57.  
  58.  
  59.  
Success #stdin #stdout 0s 9424KB
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stdin 
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stdout 
1
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https://ideone.com/P4C3H2
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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