个回答

• 木槿鱼

  2019-02-06 16:39:25

  已采纳

  //C语言里面求余用%而不是/

  #include <stdio.h>
  int main()
  {
      int arr[3][3] = {{1,2,3},{4,5,6},{7,8,9}};
      int i,j;
      int sum=0;
      for(i=0;i<3;i++)
      {
          for(j=0;j<3;j++)
          {
              if((i%2==0)&&(j%2==0))
              {
                  sum+=arr[i][j];
              }
              else if((i%2!=0)&&(j%2!=0))
              {
                  sum+=arr[i][j];
              }
             
          }
      }
      printf("对角线元素之和是：%d\n",sum);
      return 0;   
  }

  
  
  2