while(getline(cin,str)!="")
str是string结构的，上面这样判断式子有错吗

[quote]引用第6楼xuer于2007-10-06 22:41发表的  :
#include<iostream>
#include<string>
using namespace std;
void strcount(const string str);
int main()
{
    cout<<"Enter a line:\n";
    string str;
    while(getline(cin,str)!=NULL)
    {
        strcount(str);
        cout<<"Enter the next line ( enpty line to quit ):\n";
    }
    cout<<"Bye"<<endl;
    return 0;
}
void strcount(const string str)
{
    static int total=0;
    int count=0;
    cout<<"\""<<str<<"\" contains ";
    int i=0;
    while(str[i++])
        count++;
    total+=count;
    cout<<count<<" characters\n";
    cout<<total<<" characters total\n";
}quote]
红的地方多了东西