Overloading operators help
I need help understanding how to overload my arithmetic functions in my code, im not asking for it to be done, but i need help. here is what I have:
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//Fraction.cpp
#include <iostream>
#include <iomanip>
#include "fraction.h"
using namespace std;
int gcd(int u, int v)
int main()
{
int anum;
int bden;
int cnum;
int dden;
int u;
int v;
char choice;
fraction add(fraction f2);
{
do
{
cout << "a\tadd\n";
cout << "s\tsub\n";
cout << "m\tmult\n";
cout << "d\tdiv\n";
cout << "e\texit\n";
cin >> choice;
cin.ignore();
switch (choice)
{
case 'A':
case 'a':
cout << "enter the left numerator: ";
cin >> anum;
cout << "enter the left denominator: ";
cin >> bden;
cout << "enter the right numerator: ";
cin >> cnum;
cout << "enter the right denominator: ";
cin >> dden;
cout << ((anum * dden) + (bden * cnum)) / (bden * dden) << endl;
break;
case 'S':
case 's':
cout << "enter the left numerator: ";
cin >> anum;
cout << "enter the left denominator: ";
cin >> bden;
cout << "enter the right numerator: ";
cin >> cnum;
cout << "enter the right denominator: ";
cin >> dden;
cout << ((anum * dden) - (bden * cnum)) / (bden * dden) << endl;
break;
case 'M':
case 'm':
cout << "enter the left numerator: ";
cin >> anum;
cout << "enter the left denominator: ";
cin >> bden;
cout << "enter the right numerator: ";
cin >> cnum;
cout << "enter the right denominator: ";
cin >> dden;
cout << (anum * cnum) / (bden * dden) << endl;
break;
case 'D':
case 'd':
cout << "enter the left numerator: ";
cin >> anum;
cout << "enter the left denominator: ";
cin >> bden;
cout << "enter the right numerator: ";
cin >> cnum;
cout << "enter the right denominator: ";
cin >> dden;
cout << (anum * dden) / (bden * cnum) << endl;
break;
case 'E':
case 'e':
break;
default:
cerr << "unrecognized choice: " << choice << endl;
}
} while(choice != 'e' && choice != 'E');
int gcd (int u, int v);
u = (u < 0) ? -u : u;
v = (v < 0) ? -v : v;
while (u > 0)
if (u < v)
{
int t = u;
u = v;
v = t;
}
u -= v;
}
return v;
}
void print()
{
int numerator;
int denominator;
cout << numerator << '/' << denominator;
}
void read()
{
int numerator;
int denominator;
cout << "Please enter the numerator: ";
cin >> numerator;
cout << "Please enter the denominator: ";
cin >> denominator;
}
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Here is the header file:
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#include <iostream>
using namespace std;
class fraction
{
private:
int numerator;
int denominator;
public:
fraction() : numerator(), denominator(){}
void print();
fraction add(fraction f2);
void read();
};
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You'll want to use the operator keyword, and its usage is almost exactly the same:
[return] operator [symbol] ([argument list])
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Fraction& operator + (fraction& f2)
{
//do stuff here
};
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try this:
http://www.cplusplus.com/doc/tutorial/classes2/
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