暴力

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

人话：用双重循环嵌套，接上9个if判地雷（双重类型转换有点废话？）