{{keywords>wiki library source code example reference}}
===== floor =====
double floor(double);
rounding down a number
===== C Sourcecode Example =====
compile in linux with: gcc floor.c -o floor **-lm** -Wall
#include /* including standard library */
//#include /* uncomment this for Windows */
#include /* including math library */
int main ( void )
{
double y,x;
x = 4.2;
y = 9.9;
printf("floor of %f is %f\n", x, floor(x) );
printf("floor of %f is %f\n ",y , floor(y) );
return 0;
}
==== output ====
output:
user@host:~$ ./floor
floor of 4.200000 is 4.000000
floor of 9.900000 is 9.000000