#include <iostream>
#include <vector>
#include <algorithm>
int main() {
std::vector<std::string> strings = {"Hello", "World", "C++", "Programming"};
// Convert all strings to lowercase
std::transform(strings.begin(), strings.end(), strings.begin(), [](std::string& str) {
std::transform(str.begin(), str.end(), str.begin(), ::tolower);
return str;
});
// Print the lowercase strings
std::cout << "Lowercase strings:" << std::endl;
for (const auto& str : strings) {
std::cout << str << " ";
}
std::cout << std::endl;
// Convert all strings to uppercase
std::transform(strings.begin(), strings.end(), strings.begin(), [](std::string& str) {
std::transform(str.begin(), str.end(), str.begin(), ::toupper);
return str;
});
// Print the uppercase strings
std::cout << "Uppercase strings:" << std::endl;
for (const auto& str : strings) {
std::cout << str << " ";
}
std::cout << std::endl;
return 0;
}