用C语言实现矩阵边缘元素之和

#include<stdio.h>#include<stdlib.h>int main(){int m,n;int sum = 0;    system("title yourname");printf("输入矩阵的长和宽\n");scanf("%d%d",&m,&n); int a[m][n];for(int i=0;i<m;i++){for(int j=0;j<n;j++){scanf("%d",&a[i][j]);} } for(int i=0;i<m;i++){for(int j=0;j<n;j++){printf("%d\t",a[i][j]);} printf("\n");}for(int i=0;i<n;i++){sum = sum+a[0][i]+a[m-1][i];} for(int j=1;j<m-1;j++){sum = sum+a[j][0]+a[j][n-1];}printf("矩阵边缘元素之和sum=%d\n",sum);return 0;}