Thread: Why aren't my answers having decimal places

Hi all,

I am doing the Temperture Converter problem on this site: Temperature Converter Programming Challenge - Cprogramming.com

I basically did a quick program and used the example numbers giving on the above site (10 for low, 20 high, 4 for the step). I am getting the "right answers" but they are intergers and have no decimal places but 2 of the answers should have decimal places. I declared the varibles with double and tried with float but I am getting the same answer. When I input (10.2 for low, 20 for high, 4 for step) all the answers come out with a .2 at the end so I know it can print decimal places.

Am I missing something here? like do I have to declare how many decimal places somewhere?

Here is my program below.

Code:

#include <cstdlib>
#include <iostream>

using namespace std;

void Celsius_to_Fahrenheit(double celsius_low, double celsius_high, int step); 

int main()
{
    double low_limit, high_limit; 
    int increments;
    char exit;
    
    cout<<"Enter low Celcius  ";
    cin>>low_limit;
    cout<<"\nEnter high Celcius   ";
    cin>>high_limit;
    cout<<"\nEnter the ingrements you would like it to calculate by  ";
    cin>>increments;
    
    
    cout<<"\n\nCelsius          Fahrenheit\n";
    cout<<"_______          __________\n";
    
    Celsius_to_Fahrenheit(low_limit, high_limit, increments);
    
    cout<<"Press any key then enter to exit";
    cin>>exit;
    return 0;
}

void Celsius_to_Fahrenheit(double celsius_low, double celsius_high, int step)
{
    
    double Fahrenheit;
 
     while(celsius_high >= celsius_low)     
     {
           Fahrenheit = 9/5 * (celsius_low + 32); 
           
           cout<<celsius_low<<"                "<<Fahrenheit<<"\n";
           
           celsius_low = celsius_low + step;
                                           
     }
     
     
}

Thanks!!! It worked!!

This is a bit off-topic, but I had the exact same problem while trying to complete the same exercise.