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+--- Thread: Fractions in C++? (/Thread-Fractions-in-C)
Fractions in C++? - Skipperdoo32 - 09-13-2011
I was writing a primitive program involving solving a random equation, and I noticed that when I entered:
long double y;
y = (1/5) + (2/8);
cout << y
The computer could not read the fractions, and it only worked when I changed it to decimals. Is there any way to use fractions in C++, or is it limited to significant figures?
RE: Fractions in C++? - Frooxius - 09-14-2011
What you used in the expression are integer literals, so integer math was performed - it's way faster, but doesn't support fractions. To solve this, simply use double literals:
Code:
long double y;
y = (1.0/5.0) + (2.0/8.0);
cout << y;Also, long double is kind of unnecessary, in fact, even float has enough precision for this - don't waste space and performance. You can use float literals:
Code:
float y;
y = (1.0f/5.0f) + (2.0f/8.0f);
cout << y;RE: Fractions in C++? - MR.AWESOME - 09-17-2011
All you have to do is do that thing like this
long int y = (1/(5*1.0)) + (2/(8*1.0));