//example.cc
#include <iostream>
#include "reduce.h"
#include "decimal-to-fraction.h"
using namespace std;
 
int main()
{
    double deci;
    double n, d;
 
    while(1) {
        cout << "Enter a decimal to convert to a fraction ('0' to quit): ";
        cin >> deci;
        cin.ignore(INT_MAX, '\n');
        if(!deci) exit(0);
 
        dec_to_frac(deci, n, d);
 
        if (n * d != n){
            cout << '\n' << deci << " = " << n << '/' << d << "\n\n";
            cout<<'\n' << d << " x " << n;
            n = d * n;
            cout<< " = " << n << "\n\n";
            cout<<'\n' << n << '/' << d; 
            reduce(n, d);
 
            cout << " = " << n << '/' << d << "\n\n";
 
            cout<<'\n' << n << "\n\n";
        }
 
        else
            cout<<'\n' << deci<< "\n\n";
 
    }
 
    return 0;
}
 
#ifndef _REDUCE_H_
 
#error You must include "reduce.h" before this file
 
#endif /* def _REDUCE_H_ */
 
 
 
#ifndef _DECIMAL_TO_FRACTION_H_
 
#define _DECIMAL_TO_FRACTION_H_
 
 
 
void dec_to_frac(double decimal, double &numerator, double &denominator)
 
{
 
    //numerator = static_cast<int >(decimal);
    //numerator = (int )decimal;
    numerator = decimal;
 
    denominator = 1;
 
 
 
    while(numerator != (int)numerator) {
 
        numerator *= 10;
 
        denominator *= 10;
 
    }
 
    reduce(numerator, denominator);
 
}
 
 
 
#endif /* def _DECIMAL_TO_FRACTION_H_ */
 
#ifndef _REDUCE_H_
 
#define _REDUCE_H_
 
 
 
void reduce(double &numer, double &denom)
 
{
 
    int i;
 
 
 
    for(i=2; i<=numer; ++i) {
 
 
        if( ((numer/i) == ((int )(numer/i))) && ((denom/i) == ((int)(denom/i))) ) {
 
            numer /= i;
 
            denom /= i;
 
            --i;              
 
        }
 
    }
 
}
 
 
 
#endif /* def _REDUCE_H_ */