#pragma warning(disable: 4996)
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include <cstdarg>
 
double product(int numArgs, ...);
 
int main(void)
{
    double a = 1;
    double b = 2;
    double c = 3;
    double d = 4;
 
    printf("The product is: %f", product(4, a, b, c, d));
 
    printf("\n");
    return (0);
}
 
double product(int numArgs, ... )
{
    va_list ap;
    va_start(ap, numArgs);
 
	double total = 0;
    for(int i = 0; i < numArgs; i++)
    {
  		total += va_arg(ap, double);
    }
 
    va_end(ap);
    return total;
}

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