string in member functions

[Hasnain Attarwala]

my header file.


#ifndef QUADTRATICEXPRESSION_H
#define QUADRATICEXPRESSION_H
#include <string>

class quadraticExpression
{
public:
quadraticExpression (double = 0, double= 0, double =0);
void setA (double);
void setB (double);
void setC (double);

double evaluate (double x) const;

string getNumberOfRoots();

private:
double a;
double b;
double c;
};

#endif




MY CPP FILE


#include "quadraticExpression.h" // tie the files together
#include <stdexcept>
#include <iostream>
#include <stdio.h>
#include <math.h>
#include <string>

//iostream is for cin cout
using namespace std;


string quadraticExpression::getNumberOfRoots()
{
const string noOfRoots;

return noOfRoots;
}


i am getting an error msg saying that i cannot use a string for return type in member function. I need to return something to the source like "infinite roots" or "one root" or "two roots". How do i get through this, please help thanks.

[vlad from moscow]

Could you show the exact error message instead of your interpretations next time?!

In the header file you did not include the derictive
using namespace std;

[Hasnain Attarwala]

@Vlad, thankyou sir.