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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4.  
  5. #define N 9
  6.  
  7. int isValueInLineOrColumn(int val, int arr[N][N], int line, int column)
  8. {
  9.     int i,j;
  10.  
  11.     for (i=0; i < N; i++)
  12.     {
  13.         if(arr[line][i] == val)
  14.             return 1;
  15.  
  16.         if (arr[i][column] == val)
  17.             return 1;
  18.     }
  19.  
  20.     return 0;
  21. }
  22.  
  23. int main()
  24. {
  25.     int su[N][N];
  26.     int i, j;
  27.     int cont;
  28.  
  29.     srand( (unsigned)time(NULL) );//evita que o rand seja gerado pelo tempo
  30.  
  31.     for(i=0; i<N; i++)
  32.     {
  33.         for(j=0; j<N; j++)
  34.         {
  35.             cont=rand()%N;
  36.  
  37.             if(i==cont || j==cont)
  38.             {
  39.  
  40.                 int val = 1+rand()%N;
  41.  
  42.                 //verifica se já existe este valor na linha ou coluna atual.
  43.                 if(isValueInLineOrColumn(val, su, i, j))
  44.                     su[i][j]=0;
  45.                 else
  46.                     su[i][j]=val;
  47.  
  48.             }
  49.             else
  50.             {
  51.                 //usando 0 como identificador de vazio
  52.                 su[i][j]=0;
  53.             }
  54.         }
  55.     }
  56.  
  57.     for(i=0; i<N; i++)
  58.     {
  59.         for(j=0; j<N; j++)
  60.         {
  61.             if(su[i][j]!=0)
  62.                 printf("[%i]", su[i][j]);
  63.             else
  64.                 printf("[ ]");//se for igual a 0 coloca o quadrado vazio.
  65.         }
  66.         printf("\n");
  67.     }
  68.  
  69.     /*
  70.     for(i=1 ; i <= 10 ; i++)
  71.         printf("Numero %d: %d\n",i, 1+rand()%9);
  72.      */
  73.  
  74.  
  75.     return 0;
  76. }
Success #stdin #stdout 0s 2248KB
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https://ideone.com/ld7TZl
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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