[RESOLVED] float valueA = 5/9; Always evaulates to 0

[steve_rm]

Hello,

I am writing a simple C program using Visual studio 2008.

And when I divide 5 / 9. I always get an zero. However, the correct value should be 0.5555.

Can anyone explain this?

Many thanks

//Calculate the temperature in celsius
int CalculateCelsius(int fahrenheit)
{
	float valueA = 0;
	int valueB = 0;
	float celsius = 0;
	
	valueA = 5 / 9; //Always displays zero
	valueB = fahrenheit - 32;
	celsius = valueA * valueB;

	return (int) celsius;
}

[Harsh Gupta]

Since 5 and 9 are integers, the casting (or conversion) takes place after 5/9 is evaluated (which will be 0 in case of ints) and then converted to type float.

Try by converting either numerator or denominator to type float and that should work.

//one of them should work

valueA = 5f / 9; //or
valueA = 5 / 9f; //or
valueA = 5f / 9f;