Harmonic Mean

#include <stdio.h>

float harmonic_mean(float x, float y);
#define NUM1 7.90
#define NUM2 12.123
int main(void){
    printf("The harmonic mean of %.2f and %.2f is %.2f\n", NUM1, NUM2, harmonic_mean(NUM1, NUM2));
    return 0;
}

float harmonic_mean(float x, float y){
    float inverse1, inverse2, average;
    inverse1=1/x;
    inverse2=1/y;
    average=(inverse1+inverse2)/2;
    return 1/average;
}