Question

Working on computing the geometric mean of values in an array

The function should compute the geo mean correctly, but i’m getting a weird error message

#include <stdio.h>
#include <stdint.h>
#include <math.h>


extern "C"

double geomean(double myarray[], int count)      ////error here, expected '(' before string constant
{
double geomean = 1;
double root = (1/(double)count);    
int i;
for(i = 0; i < count; i++)
    {
        geomean = geomean * myarray[i];
    }
geomean = pow(geomean, root);
return geomean;
}

Answer 1

extern "C" is not valid C (it’s only valid in C++). Just remove it if you’re working in pure C.