transform.cpp

#include <algorithm>
#include <string>
#include <iostream>

using namespace std;

int main()
{
	string s1("UNIQLO");
	string s2("apple");
	
	cout << "before(s1): " << s1 << endl;
	cout << "before(s2): " << s2 << endl;

    transform(s1.begin(), s1.end(), s1.begin(), static_cast<int (*)(int)>(tolower));
	cout << "tolower(s1): " << s1 << endl;
	transform(s2.begin(), s2.end(), s2.begin(), static_cast<int (*)(int)>(toupper));
	cout << "toupper(s2): " << s2 << endl;

	return 0;
}