round function

[sachindra manoj]

what is the header file when we are dealing with round function. or it haven't a header file,so you can tell me how we work with round function

[rajesh6695]

There are two functions are available ceil() and floor() both functions are defined in the math.h header file

ceil() function will round of the value near to the highest i.e 12.54 as 13.00
floor() function will round of the value near to the smallest i.e 12.54 as 12.00

Both the function will take arguments as double or long double and return the same type of value....

[horace1]

what is the header file when we are dealing with round function. or it haven't a header file,so you can tell me how we work with round function

don't know of a function called round() - are you thinking of ceil(x) which returns the smallest integer no less than x, see
http://www.cppreference.com/stdmath/index.html

[DeMan]

Assuming you want to round in the traditional way 0.5 or greater goes to 1
less than 0.5 rounds to 0, you can use try adding .5 and calling floor (or subtracting 0.5 and czalling ceil())

float myVariable = 7.3
myVariable = myVariable +0.5
floor(myVariable):
//result = 7
 
OR
 
float myVariable = 7.3
myVariable = myVariable -0.5
ceil(myVariable):
//result = 7