Question

How to round floating point number to the closest integer in floating point format with C

Answer 1

#include <stdio.h>
#include <math.h>
 
int main()
{
    double x = 4.311, y = 6.500, z = 9.811;
    
    printf("%.3f\n", round(x));
    printf("%.3f\n", round(y));
    printf("%.3f\n", round(z));
 
    x = -4.311, y = -6.500, z = -9.811;
    
    printf("%.3f\n", round(x));
    printf("%.3f\n", round(y));
    printf("%.3f\n", round(z));
 
    return 0;
}

/*
run:

4.000
7.000
10.000
-4.000
-7.000
-10.000

*/

 

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