c++ A string with uppercase and lowercase - c++

Question

I want to ask how can I make a string in c++ that will have uppercase and lowercase? For instance, when the user will put the word forest, I want after the word forest to be like that forEST or FOreST and FORest.

Answer 1

It is possible to randomly uppercase and lowercase the characters of a string the following way:
#include <random>
#include <cctype>
#include <algorithm>
std::string random_uppercase_lowercase(std::string s) {
std::random_device rd;
std::default_random_engine generator(rd());
std::uniform_int_distribution<> distribution(0,1);
std::transform(s.begin(), s.end(), s.begin(),
[&](int ch) {
if (distribution(generator)) {
return std::toupper(ch);
} else {
return std::tolower(ch);
}
});
return s;
}

Answer 2

Try converting the std::string into char and see for each letter. If it's an uppercase, then convert into lowercase and vice versa.
A simple code explanation is here:
#include <iostream>
int main(void) {
std::string string;
std::cout << "Enter a string: ";
std::getline(std::cin, string);
size_t len = string.length();
char *pString = new char[len + 1]; // + 1 for null terminator
strcpy(pString, string.c_str()); // copies 'string' into 'pString'
for (int i = 0; i < len; i++) {
if (isupper(pString[i]))
pString[i] = tolower(pString[i]); // tolower() when isupper()
else
pString[i] = toupper(pString[i]); // toupper() when islower()
}
std::cout << pString << std::endl; // prints the converted string
return 0;
}
A sample output is as follows:
Enter a string: HeLLO wOrlD
hEllo WoRLd