How do you reverse a string in place in C or C++?

Question

How do you reverse a string in C or C++ without requiring a separate buffer to hold the reversed string?

Answer 1

My answer would be similar to most of them, but please find my code here.

//Method signature to reverse string
string reverseString(string str);

int main(void){
    string str;
    getline(cin, str);
    str =  reverseString(str);
    cout << "The reveresed string is : " << str;
    return 0;
}

/// 

///     Reverses the input string.
/// 
/// 
///    This is the input string which needs to be reversed.
/// 
/// 
///     This method would return the reversed string
/// 

string reverseString(string str){
    int length = str.size()-1;
    char temp;
    for( int i=0 ;i<(length/2);i++)
    {
        temp = str[i];
        str[i] = str[length-i];
        str[length-i] = temp;
    }
    return str;
}