C++重载符问题

黄琴 — Tue, 02 Dec 2008 11:39:00 GMT

最近做了老师布置的一个运算符重载题，发现VC6.0实在的。。。。。我不敢恭维啊
#include
#include
//using namespace std;
//我本来用的是上面这句的，而不是用下面三句using 的，结果报错。
//error C2593:'operator ==' is ambiguous
//error C2593: 'operator <' is ambiguous
//error C2593: 'operator >' is ambiguous
using std::string;
using std::cout;
using std::endl;

class String{
public :
String(){}
String(string p){ str=p; }
//friend String operator =(String s1,String s2);
friend bool operator ==(const String& s1,const String& s2);
friend bool operator >(const String& s1,const String& s2);
friend bool operator <(const String& s1,const String& s2);
//void display();

string str;
};
bool operator ==(const String& s1,const String& s2){
return s1.str==s2.str;
}

bool operator >(const String& s1,const String& s2){
return s1.str>s2.str;
}

bool operator <(const String& s1,const String& s2){
return s1.str}

int main()
{
String s1("Hello");
String s2("World");
bool b; //若b 为真则返回1，若为假则返回0
b=(s1==s2);
cout<<"s1==s2 is "< b=(s1 cout<<"s1 b=(s1>s2);
cout<<"s1>s2 is "<

return 0;
}

黄琴 2008-12-02 19:39 发表评论

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C++重载符问题