#include <stdio.h>

#include <math.h>

 int main()

{

       float i=5.4, j=5.6;

       printf("round of  %f is  %f\n", i, round(i));

       printf("round of  %f is  %f\n", j, round(j));

       return 0;

}

​

   #include <math.h>

​

   double round(double x);

   float roundf(float x);

   long double roundl(long double x);

float f = 0.5;

​

round(f);