Why does my Fahrenheit to Celsius C program output 0 and how can I fix it?

Conversions from Fahrenheit to Celsius: Essential Equation Modification

In this C program, our goal is to convert from Fahrenheit to Celsius. However, the code currently produces an unexpected output of 0. Let's investigate the reason behind this issue.

The problematic line in the code is:

fahrenheit = (5/9) * (celsius + 32);

The issue arises from the division operation (5/9). In C , integer division is performed by default, which means the result is truncated to an integer. This effectively makes the division yield 0, even though we intend it to be a floating-point value.

To correct this, we need to modify the division to use floating-point arithmetic. We can do this by casting one of the operands to a float, as follows:

fahrenheit = (5.0/9) * (celsius + 32);

By casting 5 to a float (5.0), we force the entire division to be performed in floating-point mode, resulting in the correct conversion formula.

With this modification, the program now correctly computes the Fahrenheit-to-Celsius conversion, providing accurate results when a Celsius temperature is entered.

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