Subtracting Strings ('str' not found in scope)

[slik108]

I keep running into a problem with trying to subtract strings from one another.I keep getting an error saying that:

error: 'str' was not declared in this scope

I know it has something to do with <string> only being in the std namespace. Any ideas on how to fix this?


Class Definition and whatnot

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
using namespace std;

class City
{
public:
City();

City operator +(const City& city1);
City operator -(const City& city1);



friend istream& operator >>(istream &stream, City &c1);
friend ostream& operator <<(ostream &stream, City &metro);

private:

string name;
int pop;
int area;
double ratio;

};

int choose_function();

Here's where the problem keeps coming up

City City::operator -(const City& city1)
{
City metro;
string tmp;

tmp = str.find(city1.name);
metro.name = str.erase(tmp);


metro.pop = pop - city1.pop;
metro.area = area - city1.area;

return(metro);
}

[hamsterman]

The problem is you using a variable str (on lines 6 and 7, second snippet) that has not been declared anywhere. That's what's written in the error message... I assume you wanted name instead ?

[Lurp]

your area should be a double, just so you know...also, hurry up! due soon