C :

#include<stdio.h>
int main()
{
	char a[100][100];
	int n,m,i,j,s=0;
	scanf("%d %d",&n,&m);
	for(i=0;i<n;i++){
			scanf("%s",&a[i]);
	}
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){ 
			if(a[i][j]=='*') printf("*");
			else {
				if(i==0){
					if(j==0){
						if(a[i][j+1]=='*')s++;
						if(a[i+1][j+1]=='*')s++;
						if(a[i+1][j]=='*')s++;
					}else if(j==m-1){
						if(a[i][j-1]=='*')s++;
						if(a[i+1][j-1]=='*')s++;
						if(a[i+1][j]=='*')s++;
					}else {
						if(a[i][j+1]=='*')s++;
						if(a[i+1][j+1]=='*')s++;
						if(a[i+1][j]=='*')s++;
						if(a[i][j-1]=='*')s++;
						if(a[i+1][j-1]=='*')s++;
					}
				}
				else if(i==n-1){
					if(j==0){
						if(a[i][j+1]=='*')s++;
						if(a[i-1][j+1]=='*')s++;
						if(a[i-1][j]=='*')s++;
					}else if(j==m-1){
						if(a[i][j-1]=='*')s++;
						if(a[i-1][j-1]=='*')s++;
						if(a[i-1][j]=='*')s++;
					}else {
						if(a[i][j+1]=='*')s++;
						if(a[i-1][j+1]=='*')s++;
						if(a[i-1][j]=='*')s++;
						if(a[i][j-1]=='*')s++;
						if(a[i-1][j-1]=='*')s++;
					}
				}else if(i!=0&&j==0&&i!=n-1){
						if(a[i-1][j]=='*')s++;
						if(a[i-1][j+1]=='*')s++;
						if(a[i][j+1]=='*')s++;
						if(a[i+1][j]=='*')s++;
						if(a[i+1][j+1]=='*')s++;
				}else if(i!=0&&j==m-1&&i!=n-1){
						if(a[i-1][j]=='*')s++;
						if(a[i-1][j-1]=='*')s++;
						if(a[i][j-1]=='*')s++;
						if(a[i+1][j]=='*')s++;
						if(a[i+1][j-1]=='*')s++;
				}else {
						if(a[i-1][j]=='*')s++;
						if(a[i-1][j-1]=='*')s++;
						if(a[i-1][j+1]=='*')s++;
						if(a[i][j-1]=='*')s++;
						if(a[i][j+1]=='*')s++;
						if(a[i+1][j]=='*')s++;
						if(a[i+1][j-1]=='*')s++;
						if(a[i+1][j+1]=='*')s++;
				}
				printf("%d",s);
			}
			s=0;
		}
		printf("\n"); 
	}
	return 0;
 } 

C++ :

#include <iostream>
#include <cstdio>
#define N 103
void search(int i,int j);
char a[N][N];
int n,m;
int main()  {
    scanf("%d %d",&n,&m);
    getchar();
    for (int i=0;i<n;i++)   {
        for (int j=0;j<m;j++)
            scanf("%c",&a[i][j]);
        getchar();
    }
    for (int i=0;i<n;i++)   {
        for (int j=0;j<m;j++)   {
            if (a[i][j]=='*')
                printf("*"); 
            else
                search(i,j);
            if (j+1==m) printf("\n");
        }
    }
    return 0;
}
void search(int i,int j)    {
    int flag=0;
    for (int di=-1;di<2;di++)
        for (int dj=-1;dj<2;dj++)
            {
                int x=i+di;
                int y=j+dj;
                if ((di!=0||dj!=0)&&x>=0&&x<n&&y>=0&&y<m)
                    if (a[x][y]=='*')
                        flag++;
            }
    printf("%d",flag);
}

Java :

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        int m, n;
        Scanner scanner = new Scanner(System.in);
        m = scanner.nextInt();
        n = scanner.nextInt();
        String s = scanner.nextLine();
        String[] s1 =new String[m];
        char[][] c = new char[m][n];
        for(int i = 0 ; i < m ; i++)
        {
        	s1[i] = scanner.nextLine();
        	for(int j = 0 ; j < n ; j++)
        	{
        		 c[i][j] = s1[i].charAt(j);
        	}
        }
       
        int[][] a = new int[m][n];
        for(int i = 0 ; i < m ; i++)
            for(int j = 0 ; j < n ; j++)
                a[i][j] = 0;
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                if (c[i][j] == '*') {
                    a[i][j] = -1;
                    continue;
                }
                if (i - 1 >= 0 && c[i - 1][j] == '*')
                    a[i][j] += 1;
                if (i - 1 >= 0 && j - 1 >= 0 && c[i - 1][j - 1] == '*')
                    a[i][j] += 1;
                if (i - 1 >= 0 && j + 1 < n && c[i - 1][j + 1] == '*')
                    a[i][j] += 1;
                if (j - 1 >= 0 && c[i][j - 1] == '*')
                    a[i][j] += 1;
                if (j + 1 < n && c[i][j + 1] == '*')
                    a[i][j] += 1;
                if (j - 1 >= 0 && i + 1 < m && c[i + 1][j - 1] == '*')
                    a[i][j] += 1;
                if (i + 1 < m && c[i + 1][j] == '*')
                    a[i][j] += 1;
                if (i + 1 < m && j + 1 < n && c[i + 1][j + 1] == '*')
                    a[i][j] += 1;
 
            }
        }
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                if (a[i][j] != -1)
                    System.out.print(a[i][j]);
                else {
                    System.out.print("*");
                }
            }
            System.out.println();
        }
 
    }
}

Python :

sr=input().split()
n=int(sr[0])
m=int(sr[1])
a=[["?" for i in range(m+2)] for j in range(n+2)]
b=[[0 for i in range(m)] for j in range(n)]
c=[[-1,-1,-1,0,0,1,1,1],[-1,0,1,-1,1,-1,0,1]]
for i in range(n):
    sr=input()
    for j in range(m):
        a[i+1][j+1]=sr[j]
for i in range(1,n+1):
    for j in range(1,m+1):
        if(a[i][j]=="*"):
            b[i-1][j-1]=a[i][j]
        else:
            js=0
            for k in range(8):
                a1=i+c[0][k]
                a2=j+c[1][k]
                if(a[a1][a2]=="*"):
                    js=js+1
            b[i-1][j-1]=js
for i in range(n):
    for j in range(m):
        print(b[i][j],end="")
    print()