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#2
hoho5682010-11-23 12:29
![]() #include<iostream> using namespace std; class String { public: String() {p=NULL;} String(char *str); friend bool operator>(String &string1,String &string2); friend bool operator<(String &string1,String &string2); friend bool operator==(String &string1,String &string2); void display(); char *p; }; String::String(char *str) {p=str;} void String::display() {cout<<p;} bool operator>(String &string1,String &string2) { if(strcmp(string1.p,string2.p)>0) return true; else return false; } bool operator<(String &string1,String &string2) { if(strcmp(string1.p,string2.p)<0) return true; else return false; } bool operator==(String &string1,String &string2) { if(strcmp(string1.p,string2.p)==0) return true; else return false; } void compare(String &string1,String &string2) { if(operator>(string1,string2)==1) {string1.display();cout<<">";string2.display();} else if(operator<(string1,string2)==1) {string1.display();cout<<"<";string2.display();} else if(operator==(string1,string2)==1) {string1.display();cout<<"=";string2.display();} } //大哥,少了一个括号。。还有,你不会看错误原因吗? int main() { String string1("Hello"),string2("Book"),string3("Computer"),string4("Hello"); compare(string1,string2); compare(string2,string3); compare(string1,string4); return 0; } |
#include<iostream>
using namespace std;
class String
{
public:
String()
{p=NULL;}
String(char *str);
friend bool operator>(String &string1,String &string2);
friend bool operator<(String &string1,String &string2);
friend bool operator==(String &string1,String &string2);
void display();
char *p;
};
String::String(char *str)
{p=str;}
void String::display()
{cout<<p;}
bool operator>(String &string1,String &string2)
{
if(strcmp(string1.p,string2.p)>0)
return true;
else
return false;
}
bool operator<(String &string1,String &string2)
{
if(strcmp(string1.p,string2.p)<0)
return true;
else
return false;
}
bool operator==(String &string1,String &string2)
{
if(strcmp(string1.p,string2.p)==0)
return true;
else
return false;
}
void compare(String &string1,String &string2)
{
if(operator>(string1,string2)==1)
{string1.display();cout<<">";string2.display();}
else
if(operator<(string1,string2)==1)
{string1.display();cout<<"<";string2.display();}
else
if(operator==(string1,string2)==1)
{string1.display();cout<<"=";string2.display();}
int main()
{
String string1("Hello"),string2("Book"),string3("Computer"),string4("Hello");
compare(string1,string2);
compare(string2,string3);
compare(string1,string4);
return 0;
}