题目描述：
| Problem B: Minesweeper |
The Problem
Have you ever played Minesweeper? It's a cute little game which comes within a certain Operating System which name we can't really remember. Well, the goal of the game is to find where are all the mines within a MxN field. To help you, the game shows a number in a square which tells you how many mines there are adjacent to that square. For instance, supose the following 4x4 field with 2 mines (which are represented by an * character):
*... .... .*.. ....
If we would represent the same field placing the hint numbers described above, we would end up with:
*100 2210 1*10 1110
As you may have already noticed, each square may have at most 8 adjacent squares.
The Input
The input will consist of an arbitrary number of fields. The first line of each field contains two integers n and m (0 < n,m <= 100) which stands for the number of lines and columns of the field respectively. The next n lines contains exactly m characters and represent the field. Each safe square is represented by an "." character (without the quotes) and each mine square is represented by an "*" character (also without the quotes). The first field line where n = m = 0 represents the end of input and should not be processed.
The Output
For each field, you must print the following message in a line alone:
Field #x:
Where x stands for the number of the field (starting from 1). The next n lines should contain the field with the "." characters replaced by the number of adjacent mines to that square. There must be an empty line between field outputs.
Sample Input
4 4 *... .... .*.. .... 3 5 **... ..... .*... 0 0
Sample Output
Field #1: *100 2210 1*10 1110 Field #2: **100 33200 1*100
源代码：
#include<iostream>
#include<cstring>
using namespace std;
char chi[105][105],cho[105][105];
int main()
{
int n,m,i,j,num;
num=1;
while(cin>>n>>m)
{
if(n==0 && m==0) break;
for(i=1;i<=n;++i)
for(j=1;j<=m;++j)
cin>>chi[i][j];
memset(cho,'0',sizeof(cho));
if(num!=1) cout<<endl;//第0行不输出
for(i=1;i<=n;++i)//从1开始，避免了很多判断
for(j=1;j<=m;++j)
{
if(chi[i][j]=='.') continue;
else
{
cho[i][j]='*';
if(cho[i-1][j-1]!='*') cho[i-1][j-1]+=1;
if(cho[i-1][j]!='*') cho[i-1][j]+=1;
if(cho[i-1][j+1]!='*')cho[i-1][j+1]+=1;
if(cho[i][j-1]!='*') cho[i][j-1]+=1;
cho[i+1][j-1]+=1;
cho[i][j+1]+=1;
cho[i+1][j+1]+=1;
cho[i+1][j]+=1;
}
}
cout<<"Field #"<<num++<<":"<<endl;
for(i=1;i<=n;++i)
{
for(j=1;j<=m;++j)
{
cout<<cho[i][j];
}
cout<<endl;
}
}
system("pause");
return 0;
}
题目提交了好多次，总是WA，最后发现是输出格式的错误，太悲催了。