这是一道赤裸裸的广搜+路径问题。。。。直接做吧。。。。。
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#include<queue>
#include<stdio.h>
#include<string.h>
using namespace std;
#define maxn 10
const int oo = 0xfffffff;
struct node{int x, y;}from[maxn][maxn];
int dir[4][2] = { {0,1},{0,-1},{1,0},{-1,0} };
int G[maxn][maxn], N=5;
node s={0,0}, e={4,4};
void DfsPath(int x, int y)//递归输出路径
{
if(x == 0 && y == 0)
{
printf("(0, 0) ");
return ;
}
DfsPath(from[x][y].x, from[x][y].y);
printf("(%d, %d) ", x, y);
}
void BfsPath()
{
queue<node> Q;
Q.push(s);
G[0][0] = 1;
while(Q.size())
{
s = Q.front();Q.pop();
if(s.x==e.x && s.y == e.y)
return ;
for(int i=0; i<4; i++)
{
node q = s;
q.x += dir[i][0], q.y += dir[i][1];
if(q.x>=0&&q.x<N && q.y>=0&&q.y<N && G[q.x][q.y]==0)
{
G[q.x][q.y] = 1;
from[q.x][q.y] = s;
Q.push(q);
}
}
}
}
int main()
{
int i, j;
for(i=0; i<N; i++)
for(j=0; j<N; j++)
scanf("%d", &G[i][j]);
BfsPath();
DfsPath(N-1, N-1);
return 0;
#include<stdio.h>
#include<string.h>
using namespace std;
#define maxn 10
const int oo = 0xfffffff;
struct node{int x, y;}from[maxn][maxn];
int dir[4][2] = { {0,1},{0,-1},{1,0},{-1,0} };
int G[maxn][maxn], N=5;
node s={0,0}, e={4,4};
void DfsPath(int x, int y)//递归输出路径
{
if(x == 0 && y == 0)
{
printf("(0, 0) ");
return ;
}
DfsPath(from[x][y].x, from[x][y].y);
printf("(%d, %d) ", x, y);
}
void BfsPath()
{
queue<node> Q;
Q.push(s);
G[0][0] = 1;
while(Q.size())
{
s = Q.front();Q.pop();
if(s.x==e.x && s.y == e.y)
return ;
for(int i=0; i<4; i++)
{
node q = s;
q.x += dir[i][0], q.y += dir[i][1];
if(q.x>=0&&q.x<N && q.y>=0&&q.y<N && G[q.x][q.y]==0)
{
G[q.x][q.y] = 1;
from[q.x][q.y] = s;
Q.push(q);
}
}
}
}
int main()
{
int i, j;
for(i=0; i<N; i++)
for(j=0; j<N; j++)
scanf("%d", &G[i][j]);
BfsPath();
DfsPath(N-1, N-1);
return 0;
};