Write a program in C++ to reverse a string

#include <iostream>
using namespace std;

void revOfString(const string& a);

int main()
{
    string str;
    cout << "\n\n Reverse a string:\n";
	cout << "----------------------\n";
	cout << " Enter a string: ";
    getline(cin, str);
    cout << " The string in reverse are: ";    
    revOfString(str);
    return 0;    
}

void revOfString(const string& str)
{
    size_t lengthOfString = str.size();

    if(lengthOfString == 1)
       cout << str << endl;
    else
    {
       cout << str[lengthOfString - 1];
       revOfString(str.substr(0, lengthOfString - 1));
    }
}