Question

How to use ceil() function to rounds N upward and get the smallest value that is not less than N in C

Answer 1

#include <stdio.h>     
#include <math.h>
 
int main(int argc, char **argv)
{
	printf("ceil(4.3) = %.1f\n", ceil(4.3));
	printf("ceil(6.8) = %.1f\n", ceil(6.8));
	printf("ceil(-4.3) = %.1f\n", ceil(-4.3));
	printf("ceil(-6.8) = %.1f\n", ceil(-6.8));
	printf("ceil(-0.0) = %.1f\n", ceil(-0.0));
  
    return 0;
}

/*
run:
  
ceil(4.3) = 5.0
ceil(6.8) = 7.0
ceil(-4.3) = -4.0
ceil(-6.8) = -6.0
ceil(-0.0) = -0.0

*/

 

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