C++ Program to Perform Fahrenheit to Celsius Conversion

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This C++ program performs the conversion of temperature from Fahrenheit to celsius. The program takes the temperature in Fahrenheit degrees performs conversion to Celsius degrees using a function and prints the value on the standard output stream.

Here is the source code of the C++ program that performs the conversion of temperature from Fahrenheit to celsius. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

/*
 * C++ Program to Perform Fahrenheit to Celsius Conversion
 */
 #include <iostream>
 
 double fahrenheitToCelsius(double fahrenheit)
 {
     double celsius;
 
     celsius = (fahrenheit - 32.0) * 5.0 / 9.0;
     return celsius;
 }
 
 int main()
 {
     double fahrenheit;
 
     std::cout << "Enter temperature in fahrenheit (in degrees) ";
     std::cin  >> fahrenheit;
     std::cout << "Temperature in Celsius (in degrees) = "
               << fahrenheitToCelsius(fahrenheit) << std::endl;
 }
$ a.out
Enter temperature in fahrenheit (in degrees) -40
Temperature in Celsius (in degrees) = -40

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