how to use floor(),ceil() built in function in C programming!

 #include <stdio.h>

#include <stdlib.h>

#include <ctype.h>

#include <string.h>

#include <math.h>

int main()

{

    float coins = 6.9898;

    float pennies = 7.65476;

    printf("Coins is  : %.2f$\n",floor(coins));

    printf("Pennies is  : %.2f$\n",floor(pennies));

    printf("Coins is  : %.2f$\n",ceil(coins));

    printf("Pennies is  : %.2f$\n",ceil(pennies));

    return 0;

}