我這個有什么問題嗎？求大佬幫助??！
#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("對角線元素之和是：%d\n",sum);
? ? return 0;? ??
}
2022-08-11
else if(j-i=1||i-j=1 )這一句你的意思應該是j-i等于1吧？
在C語言里“=”是“賦值”的意思，j-i=1是把1這個值賦給j-i作為結果
“==”才是“等于”的意思，改成：else if(j-i==1||i-j==1 )即可
2022-04-01
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