1 #include<stdio.h> 2  3 #define N 3 4 int main(void) 5 {    6     int array[N][N]={ 7         {1,2,3}, 8         {4,5,6}, 9         {7,8,9}10     };11 12     int i,j;13     for(i=0;i<N;++i)14     {15         for(j=0;j<N;++j)16         {17             printf("%3d",array[i][j]);18         }19         printf("\n");20     }21 22     int temp;23     for(i=0;i<N;++i)24     {25         for(j=i+1;j<N;++j)26         {27             temp=array[i][j];28             array[i][j]=array[j][i];29             array[j][i]=temp;30         }31     }32 33     for(i=0;i<N;++i)34     {35         for(j=0;j<N;++j)36         {37             printf("%3d",array[i][j]);38         }39         printf("\n");40     }41     return 0;42 }