Thread: wrong result?

Code:

#include<iostream>
#include<conio.h>

using std::cout;
using std::cin;
using std::endl;

// functions prototypes

double Celsius( double );
double Fahrenheit( double );

int main()
{
    // declare varibales
    
    double tempCelsius, tempFahrenheit;
    
    // read temperatures
    
    cout<< "Enter temperature in Celsius scale:";
    cin>> tempCelsius;
    cout<< "\nEnter temperature in Fahrenheit scale:";
    cin>> tempFahrenheit;
    
    // display results
    
    cout<< "\n" << tempCelsius << "c = " << Celsius( tempFahrenheit ) << "F";
    cout<< "\n" << tempFahrenheit << "F = " << Fahrenheit( tempCelsius ) << "c";
        
getch();
}

// definitions of Celsius() & Fahrenheit()

double Celsius( double valueA )
{
    return (5/9)*(valueA-32);
}

double Fahrenheit( double valueB )
{
    return (9/5)*valueB+32; 
}

This code gives the right answer for celsius temperature when converted from fahrenheit scale but centigrade scale to fahrenheit it gives only 0F as answer.

help needed/

>> (5/9)
Integer division.

gg

just a slight change makes it work.
only adding double or static_cast<double> doesn't give the required results on my dev c++ compiler.
y? is that?

Code:

double Celsius( double valueA )
{
    return (( double )(5.0/9.0)) *(valueA-32);
}
double Fahrenheit( double valueB )
{
    return (( double )(9.0/5.0)) *valueB+32; 
}

thanku salem