Reversing an array of chars (algorithm for this?)

[bmos31]

Ok, so I'm writing a program to convert decimal into binary. It all works with the exception that my binary shows up in reverse order and I'm having trouble with reversing the array of chars in my intToBinaryString() function.

Any tips on how to get this started?

#include<iostream>
#include<cstring>

using namespace std;

void intToBinaryString(long int, char []);

#define ARRAY_SIZE 10001

int main()
{
    long int number;
    char binary[ARRAY_SIZE];
    int count = 0;

    cout << "Enter a non-negative integer to convert to binary: ";
    cin >> number;
    if(number >= 0)
    {
        cout << "The binary representation for " << number << " is: ";
        intToBinaryString(number, binary);
    }
    else
    cout << "Enter a non-negative number" << endl;
    cout << endl << endl;
    
    system ("pause");
    return 0;
}

void intToBinaryString(long int num, char bin[])    //NOTE:check pg 817 for c-string info
{
    int remainder, n=0;
    char tempArray[ARRAY_SIZE];
    
    do
    {
        remainder = num%2;
        num = num/2;
        itoa(remainder, tempArray, 10);
        cout << tempArray;           
    }while(num > 0);                      
}