```cpp
//c++
#include<bits/stdc++.h>
using namespace std;
double n,m,a[101][101],b[101][101];
int main(){
cin>>n>>m;
for(int i = 1 ; i <= n ; i++){
for(int j = 1 ; j <= m ; j++){
cin>>a[i][j];
}
}
for(int i = 1 ; i <= n ; i++){
for(int j = 1 ; j <= m ; j++){
if(i == 1 || j == 1 || i == n || j == m){
b[i][j] = a[i][j];
}
else b[i][j] = round((a[i][j] + a[i - 1][j] + a[i + 1][j] + a[i][j - 1] + a[i][j + 1]) / 5.0);
}
}
for(int i = 1 ; i <= n ; i++){
for(int j = 1 ; j <= m ; j++){
cout<<b[i][j]<<' ';
}
cout<<endl;
}
return 0;
}
```
by __Tonycyt__ @ 2024-05-01 16:08:35
感谢大佬！(≧▽≦)
by lucus_Fu0202 @ 2024-05-01 16:24:18