4. Some Ordering

#include <iostream>
#include <string>


using namespace std;


void printLowerOrUppreCase(string* str, bool(*caseProcesses)(char&))
{

    char ch;
    for (int i = 0; i < str->length(); i++)
    {
        ch = str->at(i);
        if (caseProcesses(ch))
            str->replace(i, 1, 1, ch);
    }
    cout << str[0];
}


bool lowerCase(char& ch)
{
    if (ch >= 'A' && ch <= 'Z')
    {
        ch += 32;
        return true;
    }
    return false;
}

bool upperCase(char& ch)
{
    if (ch >= 'a' && ch <= 'z')
    {
        ch -= 32;
        return true;
    }
    return false;
}





int main()
{
    string input;
    getline(cin, input);
    string copy = input;



    printLowerOrUppreCase(&copy, lowerCase);
    cout << endl;
    printLowerOrUppreCase(&input, upperCase);


}