"Rounding" in C++ --- HELP!!!

[sjmiller05]

I am writing a program for a C++ class and I need to be able to round my numbers up to the nearest 1000 (not 1000th, the actual number 1000). For example, if my variable value came back as 325, I would need a function to round it to 1000, if the variable came back as 1555, I would need to round to 2000. Any suggestions? Other than floor and ceiling functions, which do not appear to apply in my case, I cannot find any functions available in C++. I am very new to programming and I am not sure where to go from here.

Thanks!

[manontheedge]

you can use IF statements...

if ( number <= 1499 )
number = 1000;

if ( number > 1499 )
number = 2000;

...something like that

[horace1]

a possible algorithm is
(1) number is an int value 5678
(2) mulltiplier is an int initial value 10
(3) have a loop

    while(number > multiplier*10) multiplier *= 10;  
 

(4) evaluating

(int)(ceil( (float) number / multiplier))  * multiplier
 

gives 6000