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修改后的代码In Reply To:哪位大大,看看,咋错了? Posted by:xiaolijian at 2010-08-03 10:55:32 #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 21
int h,w,count=1,x0,y0;
char a[N][N];
const int d[4][2]={{-1,0},{1,0},{0,-1},{0,1}};//前面定义错误
int check(int x,int y)
{
int j;
if(x<0||x>=h||y<0||y>=w||'#'==a[x][y]||a[x][y]=='0'||a[x][y]=='@')
j=-1;
else
j=1;
return j;
}
void dfs(int x,int y)
{
int i,j,x1,y1;
for(i=0;i<4;i++)
{
x1=x+d[i][0];
y1=y+d[i][1];
j=check(x1,y1);
if(j==1)
{
count++;
a[x1][y1]='0';
dfs(x1,y1);
}
}
return ;
}
int main()
{
int i,j;
while(scanf("%d%d",&w,&h)&&h!=0&&w!=0)
{
memset(a,0,sizeof(a));//
count=1; //前面赋值在外面
for(i=0;i<h;i++)
scanf("%s",a[i]);
for(i=0;i<h;i++)
{
for(j=0;j<w;j++)
{
if(a[i][j]=='@')
{
x0=i;
y0=j;
}
}
}
dfs(x0,y0);
printf("%d\n",count);
}
return 0;
}
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