题解 | 扫雷

#include<bits/stdc++.h>
using namespace std;
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n,m;
    cin>>n>>m;
    char a[n+1][m+1];
    int b[n+2][m+2];
    for(int i=0;i<=n+1;i++){
        for(int j=0;j<=n+1;j++){
            b[i][j]=0;
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>a[i][j];
            if(a[i][j]=='*'){
                b[i+1][j]++;
                b[i+1][j+1]++;
                b[i-1][j]++;
                b[i-1][j-1]++;
                b[i][j+1]++;
                b[i][j-1]++;
                b[i+1][j-1]++;
                b[i-1][j+1]++;
            }
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(a[i][j]=='.'){
                a[i][j]=b[i][j]+'0';
            }else{
                a[i][j]='*';
            }
            cout<<a[i][j];
        }
        cout<<endl;
    }
    return 0;
}