#include <cmath>
    double ceil( double num );

The ceil() function returns the smallest integer no less than num. For example,

     y = 6.04;
     x = ceil( y );

would set x to 7.0.

C++ also provides the following overloaded forms:

    #include <cmath>
    float ceil( float num ); // same as ceilf() in C99
    long double ceil( long double num ); // same as ceill() in C99

Related Topics: floor, fmod