calling a decimal function

[Guppy25]

Ok, so i changed the "/" to a '/' but i can't get my calculate decimal function for work. I want to call a private function calculateDecimalValue() that computes a floating decimal of the fraction inside the enterFractionValue() function after the num and den are filled. I'm not understanding how to get it inside the enterFractionValue() function. I got the slash to work but the decimal in displayDecimal is just junk. Thanks again, Here's the code i have:

class Fraction
{
private:
double num, den;
double decimal;
static char slash;


void calculateDecimalValue(float decimal);


public:
void enterFractionValue();
void displayFraction();
static void displaySlash();


};
//implementation part-to be named-fraction.cpp
char Fraction::slash='/';


void Fraction::displaySlash()
{
cout<<slash<<endl;
}


void Fraction::enterFractionValue()
{
cout <<"Please enter a numerator "<<endl;
cin >>num;
cin.ignore(80,'\n');
cout <<"The numerator is "<<num<<endl;


cout <<"Please enter a denominator "<<endl;
cin >>den;
cin.ignore(80,'\n');


while (den == 0)
{
cout<<"Enter a number greater than zero."<<endl;
cin >>den;
cin.ignore(80,'\n');
}
cout <<"The denominator is "<<den<<endl;


}
void Fraction::calculateDecimalValue(float decimal)
{
decimal = num/den;
cout<<decimal<<endl;
}


void Fraction::displayFraction()
{
int input;


cout<<"Enter the number 1 to see fraction in fraction format or "<<endl;
cout<<"the number 2 to see it in decimal form"<<endl;
cin>>input;
cin.ignore(80,'\n');
while (input != 1 && input !=2)
{
cout<<"Your entry must be a 1 or a 2, please try again."<<endl;
cin>>input;
cin.ignore(80,'\n');
}
if   (input == 1)


cout<<"The fraction in traditional form is "<<num <<slash<<den<<endl;


if (input == 2)


cout<<"The fraction in decimal form is " <<decimal<<endl;


}
//main function to be named testfraction.cpp
#include <iostream.h>
#include "fraction.h"
#include "fraction.cpp"
int main()
{
Fraction oneFraction;
oneFraction.enterFractionValue();
oneFraction.displayFraction();


cout << "Press Enter to continue";
getchar();
return 0;
}

[murschech]

You don't need a private function here. Also I don't think it's a good idea to make the numerator and denominator doubles. For one thing, they may not print out properly, i.e., you may have a fraction 3.0/4.0 where you really want 3/4.

Attached is a simple fraction program. (It really should be improved by reducing to lowest terms.)

[murschech]

Ok, so i changed the "/" to a '/' but i can't get my calculate decimal function for work. I want to call a private function calculateDecimalValue() that computes a floating decimal of the fraction inside the enterFractionValue() function after the num and den are filled. I'm not understanding how to get it inside the enterFractionValue() function. I got the slash to work but the decimal in displayDecimal is just junk. Thanks again,

You don't need a private function.. Here's a simple fraction class. I hope this works. The last time I tried attaching a file I didn't succeed.)