Hello, everyone my brother was given an assignment to do in C, I know C++ and C# so I write it out in C++ to get a better understanding of what the brief wants us to do.

I have the program working, but with modifications to the brief.

Brief

Write a program that calculates the Root-Mean-Square (RMS) of a

sequence of numbers whose length and content are determined by the

user. The RMS calculation should be done in a function of prototype

double RMS(double *x, int N), where N is the number of elements

in the array x. Demonstrate its use in a main function which prompts

the user for the length of the sequence, and then the values of this

sequence (e.g. if the user gives 3 as a sequence length, he/she should

thereafter be asked for 3 values).

This is what I wrote

Code:

#include <iostream>
#include <math.h>
double RMS(double x, int N);
using namespace std;
int main()
{
int arraysize(0);
double total(0);
double content(0);
cout << "How many number's should there be." << endl;
cin >> arraysize;
double array[arraysize];
for(int i = 0; i < arraysize; ++i)
{
cout << "Enter number " << i << endl;
cin >> content;
array[i] += content;
total += content;
}
cout << RMS(total, arraysize);
return 0;
}
double RMS(double x, int N)
{
double result(0);
result = x * x / N;
sqrt(result);
return result;
}

What Im not sure of is the prototype in the brief.

double RMS(double *x, int N)

Is double *x a pointer or does he just mean array because they are similar but not the same.

I did it all from memory so go easy on me if there is some noobish mistakes the last time I used C++ was a long time ago.