我这个有什么问题吗？求大佬帮助！！

#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)

{

sum +=arr[i][j];

}

else if(j-i=1||i-j=1 )

{

sum +=arr[i][j];

}

}

}

printf("对角线元素之和是：%d\n",sum);

return 0;

}

1284Happy_Z

2022-03-26

源自：C语言入门 6-11

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2 回答

JYYANG
2022-08-11

else if(j-i=1||i-j=1 )这一句你的意思应该是j-i等于1吧？

在C语言里“=”是“赋值”的意思，j-i=1是把1这个值赋给j-i作为结果

“==”才是“等于”的意思，改成：else if(j-i==1||i-j==1 )即可

0 回复有任何疑惑可以回复我~

慕妹0327896
2022-04-01

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