C语言实现3*3数组对角线之和示例

#define _CRT_SECURE_NO_WARNINGS 1#include<stdio.h>#include<windows.h>  int SUM(char arr[][3]){	int i = 0;	int j = 0;	int sum = 0;	for (i = 0; i < 3; i++)	{		for (j = 0; j < 3; j++)		{			if (i == j)			{				sum += arr[i][j];			}			if (i + j == 2)			{				sum += arr[i][j];			}		}	}	sum -= arr[1][1];	return sum;}int main(){	char arr[3][3] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };	printf("the answer is %d/n",SUM(arr));	system("pause");	return 0;}