Question

How to use round() function to round to nearest integer in floating-point format, halfway cases away from zero in C

Answer 1

#include <stdio.h>     
#include <math.h>
 
int main(int argc, char **argv)
{   
	printf("round(3.3) = %.1f\n", round(3.3));
    printf("round(3.5) = %.1f\n", round(3.5));
    printf("round(4.5) = %.1f\n", round(4.5));    
    printf("round(4.6) = %.1f\n", round(4.6));
    printf("round(-3.3) = %.1f\n", round(-3.3));
    printf("round(-3.5) = %.1f\n", round(-3.5));
    printf("round(-4.5) = %.1f\n", round(-4.5));    
    printf("round(-4.6) = %.1f\n", round(-4.6));
  
    return 0;
}
 
/*
run:
   
round(3.3) = 3.0
round(3.5) = 4.0
round(4.5) = 5.0
round(4.6) = 5.0
round(-3.3) = -3.0
round(-3.5) = -4.0
round(-4.5) = -5.0
round(-4.6) = -5.0

*/

 

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