Working energy: rounding

Usage: double ceil (double x);

Function Name: Floor

Working energy: rounding down

Usage: double floor (double X);

In addition, (int) (expression) rounds down the result of [expression].

Here's an example:

# include & ltstdio.h & gt

# include & ltmath.h & gt

int main(void){

int x = 1 1；

int y=0，z = 0；

Double a= 12.69, b=0.0, c = 0.0.

y = x/3；

z =(int)a；

B = floor (a);

c = ceil(a)；

printf("\n \t y = %d \n "，y)； // y = 3

printf("\n \t z = %d \n "，z)； // z = 12

printf("\n \t b = %5.2lf "，b)； // b = 13.00

printf("\n \t c = %5.2lf "，c)； // c = 12.00

Returns 0;

}