a question about / operator

Charunks · #1 20-Jul-2003, 13:40

Hey guys, I'm learning C++. I've written my own first programs and I noticed this.

how come :

statement:
C=a/b;

if a/b<1 the program will say C=0. Even when I defined C as float.

Should you define C as another type, or can't c++ calculate with numbers -1 > 0 < 1 ?

thnx

Garth Farley · #2 21-Jul-2003, 02:40

If C is defined as a float, it should have a few decimal points.

Floats won't throw away that much info.

For curiosity, try making C a double.

How do you print out the answer? If you're using printf, and it's outputting an integer %d, it probably is rounding it for you.

Garth Farley

Charunks · #3 21-Jul-2003, 11:38

here's a part:

CPP / C++ / C Code:

float Omtrek(int x) // surroundingdistance
{
	return x*PI;
}

float Oppervlakte(int x) // area of a circle
{
	return (PI*x*x);
}
float OppervlakteBol(int x) area of the outside of the sphere
{
	return (4*PI*x*x);
}
float Inhoud(int x) // 'contents' of the circle
{
	return (4*PI*x*x*x/3);
 /* this is a small problem. If I write 4/3*PI*x*x*x the anwser is wrong. Also if I devide diameter into two to get the radius and the diameter < 2 the radius would be 0*/
}

I'm printing with the cout << " "; function

I will try making some floats double's.

thnx

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