Passing an array as a parameter to a function - c++

Question

So I'm doing a programming assignment and I've ran into an issue, when every I attempt to pass the arrays to the header file, I receive an error while compiling, I'm not too clear as how to do this and would much appreciate so assistance in passing these arrays.
Here is the Header file "sorting.h"
#include <iostream>
#include <cstdlib>
using namespace std;
int cost = 0;
void bubble(int Ar[],int N)
{
cost=0;
int swaps = 1;
while(swaps)
{
swaps=0;
for(int i = 0;i<N;i++)
{
if(Ar[i]>Ar[i++])
{
swap(Ar[i],Ar[i++]);
swaps = 1;
cost += 6;
}
cost++;
}
}
for(int i=0;i<N;i++)
{
cout<<Ar[i]<<endl;
}
cout<<cost<<endl;
}
void shellSort(int Ar[], int N)
{
cost=0;
int swaps = 1;
int gap = N/2;
while(gap>0)
{
while(swaps)
{
swaps = 0;
for(int i = 0;i<N;i++)
{
if(Ar[i]>Ar[i+gap])
{
swap(Ar[i],Ar[i+gap]);
swaps = 1;
cost+=6;
}
cost++;
}
}
gap=gap/2;
}
for(int i = 0;i<N;i++)
{
cout<<Ar[i]<<endl;
}
cout<<cost<<endl;
}
void quickSort(int Ar[],int left, int right, int N)
{
cost = 0;
int i=left,j=right,tmp;
int pivot = Ar[(left+right)/2];
/*partition*/
while(i<=j)
{
while(Ar[i]<pivot)i++;
while(Ar[j]>pivot)j--;
if(i<=j)
{
tmp=Ar[i];
Ar[i]=Ar[j];
Ar[j]=tmp;
i++;
j--;
cost +=6;
}
cost+=1;
}
/* recursion*/
if(left<j)quickSort(Ar,left,j,N);
if(i<right)quickSort(Ar,i,right,N);
for(int i=0;i<N;i++)
{
cout<<Ar[i]<<endl;
}
cout<<cost<<endl;
}
/*#if _INCLUDE_LEVEL__<1
int main()
{
}
#endif*/
and here is the main file "sorting2.cpp"
#include <iostream>
#include <cstdlib>
#include "sorting.h"
using namespace std;
//void bubble();
//void shellSort();
//void quickSort();
int main()
{
int N = 20;
int Ar[N];
int Ar2[N];
for(int i = 0;i<N;i++)
{
Ar[i] = Ar2[i] = rand()%100;
}
bubble(Ar[],N);
for(int i = 0;i<N;i++)
{
Ar[i] = Ar2[i];
}
shellSort(Ar[],N);
for(int i = 0;i<N;i++)
{
Ar[i] = Ar2[i];
}
quickSort(Ar[],0,19,N);
}
Thanks in advance!

Answer 1

Change
bubble(Ar[],N);
to
bubble(Ar, N);
(and in other similar places as well)
There are also other problems in your code:
Variable-length arrays are not part of C++ standard:
int Ar[N];
int Ar2[N];
You should change int N = 20; to const int N = 20;
This line produces undefined behavior because the order of evaluation of operator arguments is unspecified:
if(Ar[i]>Ar[i++])