How to properly overload the == operator?

[Sankalan]

I am trying to overload the == operator for a String class

bool String::&operator==(const char data[])
        {
 
            for(int i=0;string[i]!='\0';i++)
            {
                if(string[i]!=data[i]){return false;}
            }
            if(data[i+1]='\0'){return true;}
            return false;
        }
 

running this:{
String mstr;
mstr="Hello World";
if(mstr=="Hello world"){...}
} gives me a bunch of errors. Can anyone help?

[weaknessforcats]

The equality operator== will return a bool. Things are equal or they're not.

The first operator is the object on the left of the operator. The second object is the one on the right of the operator.

Arguments should be by reference to avoid making a copy.

You must write code that compares the two objects. his does not mean comparing every data member but you must execute whatever logic is required to compare the left object with the right object.

The operator== may or may not be a member function.
You may have several operator== functions if your object can be compared to to other objects of different types.