Question

Using C++

1) Write a function that receives the numerator and denominator of a fraction and returns its corresponding value as a double precision real number. The function also receives the number of digits that the value must be rounded to before returned. To test it, you must implement the algorithm provided below. Note: You must define the most appropriate type of function, the parameter list (using the most appropriate parameters), and the body of the function to be implemented. • You must call the function in main(). Do not format the output • Make sure you do not lose any information when you calculate the real number Formula to calculate the value of a fraction: Value = num den // This function receives the numerator and denominator of a fraction and returns its corresponding // value as a double precision real number // The function also receives the number of digits that the value must be rounded to before returned frac2real(_ _) int main() // declare a variable to hold the numerator // declare a variable to hold the denominator // declare a variable to hold the number of digits

Answer 1

#include <iostream>
#include <cmath>
using namespace std;

double frac2real(int num, int den,int numOffDigit)
{
//variable declaration
double value;
value = (double) num / den;
  
value = (int)(value * pow(10, numOffDigit) + .5);
value = value / pow(10, numOffDigit);
return value;
}

int main()
{
//variable declaration
int num, den, numOffDigit;
  
//get input from the user
cout<<"Please enter the numerator and the denominator: ";
cin>>num>>den;
cout<<"Now the number of decimal digits for the real number: ";
cin>>numOffDigit;
  
//display output
cout<<endl<<"Numerator: "<<num;
cout<<endl<<"Denominator: "<<den;
cout<<endl<<"Fraction = "<<frac2real(num, den, numOffDigit);

return 0;
}

OUTPUT: