toupper
#include <iostream>
#include <string>
using namespace std;
int main() {
string a = "Hello Bill Gates.";
for (int i = 0; i < a.length(); i++) {
a[i] = toupper(a[i]);
}
cout << a;
system("pause");
return 0;
}
#include <iostream>
#include <string>
#include <locale>
using namespace std;
int main() {
string a = "Hello Bill Gates.";
locale loc;
for (auto elem : a)
cout << toupper(elem, loc);
cout << a;
system("pause");
return 0;
}