macOS Removing Digital Points (for all c programes)

[Quboid]

Hey guys/girls, just a quick question. Does anyone have an idea as to what function i need to use to remove decimal points from a number in C. I tried the round function but the compiler is not recognising it (i am using mat.h library). Any help would be greatly appreciated.
THanks

ps. I am on a windows machine.

 

[SamMiller0]

check the printf man page

 

[Eraserhead]

It's math.h .

One way is to multiply the number up, add 0.5 and convert to an int/long and then multiply back down, though that adds inaccuracies to your calculations.

 

[toddburch]

I tried the round function but the compiler is not recognising it

Can we go back to this? Can you post the error message? Your code snippet?

 

[lazydog]

I'm not sure exactly what you want to do, but if all you want to do is to convert, say, a float to the nearest int then roundf() is the right way to do it. Failing that you could do something like this:

int int_value = float_value > 0.0f ? float_value + 0.5f : float_value - 0.5f ;

b e n

 

[ChrisA]

The simplest way to round a float to an int is like this


somefunct()
{
double f = 2.3;
int i;

i = (int)(f+0.5);
}

Adding .5 and then truncating has the effect of rounding but saves having to do a test and branch

 

[Quboid]

The simplest way to round a float to an int is like this


somefunct()
{
double f = 2.3;
int i;

i = (int)(f+0.5);
}

Adding .5 and then truncating has the effect of rounding but saves having to do a test and branch

Thats the simpliest way?