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大牛们看看 为啥容器VECTOR要先加clear()函数 不加就错了 附代码#include<iostream>
#include<queue>
#include<vector>
using namespace std;
int used[1010][1010]={0};
typedef struct mystruct
{
int x,y,x1,y1,flag,pre;
}mystruct;
vector<mystruct> Q1;
void outprint(mystruct node)
{
if(node.pre!=-1)
{
outprint(Q1[node.pre]);
if(node.flag==0)
cout<<"fill A"<<endl;
if(node.flag==1)
cout<<"fill B"<<endl;
if(node.flag==2)
cout<<"empty A"<<endl;
if(node.flag==3)
cout<<"empty B"<<endl;
if(node.flag==4)
cout<<"pour A B"<<endl;
if(node.flag==5)
cout<<"pour B A"<<endl;
}
else
return ;
}
void BFS(mystruct node,int N)
{
queue<mystruct> Q;
mystruct node1;
Q.push(node);
Q1.push_back(node);
int c=0;
used[0][0]=1;
Q1.clear(); //不加就错了
while(!Q.empty())
{
node=Q.front();
Q1.push_back(node);
if(node.y1==N)
{
outprint(node);
cout<<"success"<<endl;
return ;
}
else
{
if(node.x1!=node.x&&used[node.x][node.y1]==0)//填满x 0
{
used[node.x][node.y1]=1;
node1=node;
node1.x1=node.x;
node1.flag=0;
node1.pre=c;
Q.push(node1);
}
if(node.y1!=node.y&&used[node.x1][node.y]==0)//填满y 1
{
used[node.x1][node.y]=1;
node1=node;
node1.y1=node.y;
node1.pre=c;
node1.flag=1;
Q.push(node1);
//Q1.push_back(node1);
}
if(node.x1!=0&&used[0][node.y1]==0)//倒掉x 2
{
used[0][node.y1]=1;
node1=node;
node1.x1=0;
node1.pre=c;
node1.flag=2;
Q.push(node1);
//Q1.push_back(node1);
}
if(node.y1!=0&&used[node.x1][0]==0)//倒掉y 3
{
used[node.x1][0]=1;
node1=node;
node1.y1=0;
node1.pre=c;
node1.flag=3;
Q.push(node1);
//Q1.push_back(node1);
}
if(node.x1<=node.y-node.y1&&used[0][node.y1+node.x1]==0)//如果x1里面的水少过y-y1的 x倒到y 4
{
used[0][node.y1+node.x1]=1;
node1=node;
node1.x1=0;
node1.y1=node.y1+node.x1;
node1.pre=c;
node1.flag=4;
Q.push(node1);
//Q1.push_back(node1);
}
if(node.x1>node.y-node.y1&&used[node.x1-node.y+node.y1][node.y]==0)//如果x1里面的水多过y-y1的 x倒到y 4
{
used[node.x1-node.y+node.y1][node.y]=1;
node1=node;
node1.x1=node.x1-node.y+node.y1;
node1.y1=node.y;
node1.pre=c;
node1.flag=4;
Q.push(node1);
//Q1.push_back(node1);
}
if(node.y1<=node.x-node.x1&&used[node.x1+node.y1][0]==0) //5
{
used[node.x1+node.y1][0]=1;
node1=node;
node1.y1=0;
node1.x1=node.y1+node.x1;
node1.pre=c;
node1.flag=5;
Q.push(node1);
//Q1.push_back(node1);
}
if(node.y1>node.x-node.x1&&used[node.x][node.y1-node.x+node.x1]==0) //5
{
used[node.x][node.y1-node.x+node.x1]=1;
node1=node;
node1.x1=node.x;
node1.y1=node.y1-node.x+node.x1;
node1.pre=c;
node1.flag=5;
Q.push(node1);
//Q1.push_back(node1);
}
}
Q.pop();
c++;
}
}
int main()
{
int Ca,Cb,N,d;
mystruct node;
while(cin>>Ca&&cin>>Cb&&cin>>N)
{
for(int i=0;i<=1000;i++)
for(int j=0;j<=1000;j++)
used[i][j]=0;
node.x=Ca;
node.y=Cb;
node.x1=0;
node.y1=0;
node.pre=-1;
BFS(node,N);
}
return 0;
}
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