#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+j==0||i+j==2||i+j==4) {sum+=arr[i][j];} }
#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+j==0||i+j==2||i+j==4)
{sum+=arr[i][j];}
}
}
printf("对角线元素之和是:%d\n",sum);
return 0;
}