Operator overloading c++

#1

https://pastebin.com/0F4xA4Bn
class String{
string s;
public:
void getS(){cout<<s;}
void setS(){cin>>s;}
String operator=(String a){
String b;
b.s=a.s;
return b;
}
};
int main(){
String a;a.setS();
String b;b=a;
b.getS();//no output
}
why no output?

#2

Dont use
String b;
b=a;

Use
String b=a; //Proper format of calling operator overloading

Updated Code:
class String{
string s;
public:
void getS(){cout<<s;}
void setS(){cin>>s;}
String operator=(String a){
String b;
b.s=a.s;
return b;
}
};
int main(){
String a;a.setS();
String b=a;
b.getS();
}

Hit like if u get it.

1 Like
#3

what if i want to do something like:
String b=a;
b=c;
how will this work? or in other words, what if i want to use b=a only?

#4

you want to copy a to b and then b to c ?

#5

copy a to b, then copy c to b.

#6

the string standard lib class allows something like this:
string b=a;
b=c;//a and c are some other string

how can i implement this in my own String class?

#7

you can use this :slight_smile:

class String{
string s;
public:
void getS(){cout<<s;}
void setS(){cin>>s;}
void operator=(const String a) //See this
{
s=a.s;

}
};
int main(){
String a,b;
a.setS();
b=a;
b.getS();//no output
}
you can refer this :slight_smile:
https://www.tutorialspoint.com/cplusplus/assignment_operators_overloading.htm

Hit like if u get it

#8

can you tell why my original code not working?

#9

Cozz operator overloading code is much similar to copy constructor in classes.
You can check the code of copy constructor in C++.

1 Like
#10

I didn’t get it, why is your code working?

whats wrong in my code:
String operator=(String a)
{
String b;
b.s=a.s;
return b;
}