Hey,
My brother asked me to help him in his homework. His instructor asked him to create a program that will convert Celsius to Fahrenheit and vice versa using Java.
I don't know the formula and I have no knowledge on how to do this. Can you help me?
Thanks
Convert Celsius to Fahrenheit and vice versa
//Conversion in Java Celsius to Fahrenheit and Fahrenheit to Celsius
Formulae:
C / 100 = ( F – 32 ) / 180
import java.io.* ;
public class Temperature{
// c / 100 = ( f – 32 ) / 180
public static void main(String args[]){
InputStreamReader inputstream = new InputStreamReader ( System.in ) ;
BufferedReader buffer = new BufferedReader( inputstream ) ;
try {
//Celsius to Fahrenheit
System.out.print(" Enter Celsius value for conversion to Fahrenheit: ");
String txt = buffer.readLine();
double C=Integer.parseInt( txt );
double F=( C * 180 / 100 ) + 32;
System.out.print("Converted Fahrenheit Value: "+F);
//Farenheit to Celsius
System.out.print(" n Enter Fahrenheit value for Conversion to Celsius: ");
txt = buffer.readLine();
F=Integer.parseInt(txt);
C=( ( F – 32 ) / 180 ) * 100;
System.out.print("Converted Celsius Value: " + C);
}
catch (IOException err) {
System.out.println(" Error reading line from Input board ");
}
}
An explanation,
The equation that relates Celsius, Fahrenheit & Kelvin is
c/100=(f-32)/180=(k-273)/100.
here we need only the first part.
c/100=(f-32)/180
This equates in Celsius to c=(f-32)*100/180
and in Fahrenheit to f=(c*180/100) + 32
Thus the system accepts a Celsius value at first and then tries to change into Fahrenheit as shown ion the above formulas and prints the output in a double format, means in fraction.
Next it accepts a Fahrenheit value and tries to solve it using the above formulas and converts to Celsius.
All you get i two values of conversion.
For the input, Input Stream Reader is called and that it may throw the IO exception if the input is not properly read.
Thanks.
Convert Celsius to Fahrenheit and vice versa
Hi Jennifer,
Please see below a simple java program that will convert Celsius to Fahrenheit and Fahrenheit to Celsius. You need to input a temperature and the program will give both conversions.
This demonstrates input and output in Java using Scanner Class.
import java.util.Scanner;
class TempConverter {
public static void main(String[] args) {
int temp,far,cel;
System.out.print("What is the temperature you'd like to convert? ");
Scanner myScanner = new Scanner(System.in);
temp = myScanner.nextInt();
far = temp * 9 / 5 + 32; //use this line if Celsius to Fahrenheit
cel = (temp – 32) * 5 / 9; // use this line if Fahrenheit to Celsius
System.out.println("Fahrenheit –> Celsius: " + cel); //use this line if Celsius to Fahrenheit
System.out.println("Celsius –> Fahrenheit: " + far);// use this line if Fahrenheit to Celsius
}
}
