Answer:
The method written in C++ is as follows:
#include <iostream>
#include <stdarg.h>
using namespace std;
int prod(int listsnum,...) {
va_list mylist;
int product = 1;
va_start(mylist, listsnum);
for (int i = 0; i < listsnum; i++)
product *= va_arg(mylist, int);
va_end(mylist);
return product;
}
Explanation:
This line defines the method along with the series of integers
int prod(int listsnum,...) {
This declares the variable-length list using va_list as the declaration
va_list mylist;
This initializes product to 1
int product = 1;
This initializes the variable-length list
va_start(mylist, listsnum);
The following iteration calculates the product of the list
for (int i = 0; i < listsnum; i++)
product *= va_arg(mylist, int);
This ends the the variable-length list
va_end(mylist);
This returns the product of the list
return product;
}
To call the method from the main, make use of:
cout<<"Product: "<<prod(4, 2,3,4,5);
The first 4 in the list indicates the number of items in the list while the 4 other items represents the list elements
You can also make use of:
cout<<"Product: "<<prod(2, 6,5);
