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Re:给大家一个正确的代码,供不过者参考

Posted by yzy123 at 2009-07-19 23:52:22 on Problem 1251
In Reply To:给大家一个正确的代码,供不过者参考 Posted by:zpdlut at 2009-02-19 16:56:02
> #include<iostream>
> using namespace std;
> void prim(int input[26][26],int n)
> {
> 	int sum=0,min,i,k;
> 	int s[26]={0},lowcost[26];
> 	s[0]=1;
> 	for(i=1;i<n;i++)
> 		lowcost[i]=input[0][i];
> 	for(i=0;i<n-1;i++)
> 	{
> 		min=101;
> 		int j=0;
> 		for(k=1;k<n;k++)
> 		{
> 			if(!s[k]&&lowcost[k]<min)
> 			{
> 				min=lowcost[k];
> 				j=k;
> 			}
> 		}
> 		sum+=min;
> 		s[j]=1;
> 		for(k=1;k<n;k++)
> 		{
> 			if(!s[k]&&input[j][k]<lowcost[k])
> 				lowcost[k]=input[j][k];
> 		}
> 	}
> 	cout<<sum<<endl;
> }
> int main()
> {
> 	int input[26][26],start,end;
> 	int num,n;
> 	char ch1;
> 	while(cin>>num&&num!=0)
> 	{
> 		memset(input,101,sizeof(input));
> 		for(int i=0;i<num-1;i++)
> 		{
> 			cin>>ch1>>n;
> 			start=ch1-'A';
> 			for(int j=0;j<n;j++)
> 			{
> 				cin>>ch1;
> 				end=ch1-'A';
> 				cin>>input[start][end];
> 				input[end][start]=input[start][end];
> 			}
> 		}
> 		prim(input,num);
> 	}
> 
> 		return 1;
> }

你比苏强还苏强

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