c语言作业

#include <stdio.h>

void main()

   {

      int array[3][3];

      int i,j,sum = 0;  

      for(i = 0; i < 3; i++)   

            {   

                    for(j = 0; j < 3; j++)

                     {

                            printf("请输入第%d行第%d列的数字：",i+1,j+1);

                             scanf("%d",&array[i][j]);

                      } 

            }

          for(i = 0; i < 3; i++)

               {

                   for(j = 0; j < 3; j++)

                          {   

                               if(i == j)  

                                   {    

                                      sum += array[i][j];   

                                     }  

                               else if(i + j == 2)  

                                 {

                                    sum += array[i][j]; 

                        } 

                   } 

 }