//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_ */