用二维字符数组获取

#include<bits/stdc++.h>
using namespace std;
#define N 105
#define f(i,a,b) for(int i=a;i<=b;i++)
char a[N][N];
int r[]={-1,0,1,0,-1,1,-1,1},c[]={0,-1,0,1,-1,-1,1,1};
int main(){
	freopen("mine.in","r",stdin);
	freopen("mine.out","w",stdout);
	int n,m;
	cin>>n>>m;
	getchar();
	f(i,1,n){
		f(j,1,m){
			cin>>a[i][j];
			if(a[i][j]!='*') a[i][j]='0';
		}
		getchar();
	}

	f(i,1,n)
		f(j,1,m)
                        if(a[i][j]=='*'）
			        f(k,0,7)
				       if(a[i+r[k]][j+c[k]]!='*')
					       a[i+r[k]][j+c[k]]=a[i+r[k]][j+c[k]]+1;

	f(i,1,n){
		f(j,1,m)
			cout<<a[i][j];
		cout<<'\n';
	}

	return 0;
}

用string和int二维数组获取

#include<bits/stdc++.h>
using namespace std;
#define N 105
#define f(i,a,b) for(int i=a;i<=b;i++)
int a[N][N];
int r[]={-1,0,1,0,-1,1,-1,1},c[]={0,-1,0,1,-1,-1,1,1};
int main(){
	freopen("mine.in","r",stdin);
	freopen("mine.out","w",stdout);
	int n,m;
	cin>>n>>m;
	string s;
	f(i,1,n){
		cin>>s;
		f(j,1,m){
			if(s[j-1]=='*') a[i][j]=-1;
			else a[i][j]=0;
		}
	}

	f(i,1,n)
		f(j,1,m)
			f(k,0,7)
				if(a[i][j]==-1&&a[i+r[k]][j+c[k]]!=-1)
					a[i+r[k]][j+c[k]]=a[i+r[k]][j+c[k]]+1;

	f(i,1,n){
		f(j,1,m)
			if(a[i][j]==-1) cout<<'*';
			else cout<<a[i][j];
		cout<<'\n';
	}

	return 0;
}