minval.cpp find de min value in an array of C

minval.cpp

#include <algorithm>
#include <iostream>
#include <vector>

#define NELEMS(x)  (sizeof(x) / sizeof(x[0]))

using namespace std; 

double minval(double x[])
{
	int n = NELEMS(x)
	
	int t;
	double small = x[0];
    for(t = 0; t < n; t++)
    {
         if(x[t] < small)
         {
			 small = x[t];
		 }
	 }
	 return small;
}
      
    


int main()
{
    double a[] = {3, 1, 4, 1, 5, 9};
 
    cout << minval(a) << endl;
    
    return 0;
}