CODEWITHSUNDEEP
c++stringclassoverloadingoperator-keyword
Kira - The God
Kira - The God

Reputation: 115

overloading >> operator for string class c++

I have a problem with overloading >> operator for string class; here is my class:

class str
{
    char s[250];
    public:
    friend istream& operator >> (istream& is, str& a);
    friend ostream& operator << (ostream& os, str& a);
    friend str operator + (str a, str b);
    str * operator = (str a);
    friend int operator == (str a, str b);
    friend int operator != (str a, str b);
    friend int operator > (str a, str b);
    friend int operator < (str a, str b);
    friend int operator >= (str a, str b);
    friend int operator <= (str a, str b);
};

and here is overloaded operator:

istream& operator >> (istream& in, str& a)
{
    in>>a.s;
    return in;
}

the problem is that it reads the string only to first space(only one word from sentence).

I solved it. Found the answer on dreamincode :D

Upvotes: 1

Views: 6925

Answers (3)

Michael Krelin - hacker
Michael Krelin - hacker

Reputation: 143289

That's how it works, you probably want to use std::getline(std::istream&,std::string&) of std::getline(std::istream&,std::string&,char).

edit: others, suggesting istream's getline are also right.

Upvotes: 1

Praetorian
Praetorian

Reputation: 109289

The behavior for operator>> is to read until the first whitespace character. Change your function to the following:

istream& operator >> (istream& in, str& a)
{
    in.getline( a.s, sizeof(a.s) );
    return in;
}

Upvotes: 3

Kurospidey
Kurospidey

Reputation: 423

The overloaded operator>>() for the istream class just takes the input till it finds any blank space (tab, newline, space characters). You need to use the getline method.

...
istream& operator >> (istream& in, str& a)
{
    in.getline(a.s, 250);
    return in;
}
...

Upvotes: 1

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