ceil example in C

Header file:

    math.h

Synopsis:

     double ceil(double x);

Description:

     Returns the ceiling of x. (If x is 4.5, value 5 will be returned).

ceil function C example:

  #include<stdio.h>
  #include<math.h>
  int main() {
        double input, res;
        printf("Enter your input:");
        scanf("%lf", &input);
        res = ceil(input);
        printf("ceil(%lf):%lf\n", input, res);
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/cpgms/math$ gcc ceil.c -lm
  jp@jp-VirtualBox:~/cpgms/math$ ./a.out
  Enter your input:4.5
  ceil(4.500000):5.000000