📅  最后修改于: 2022-03-11 14:44:57.149000             🧑  作者: Mango
#include
#include
using namespace std;
int main()
{
char letter;
cout << "You will be asked to enter a character.";
cout << "\nIf it is a lowercase character, it will be converted to uppercase.";
cout << "\n\nEnter a character. Press . to stop: ";
cin >> letter;
if(islower(letter))
{
letter = isupper(letter);
cout << letter;
}
while(letter != '.')
{
cout << "\n\nEnter a character. Press . to stop: ";
cin >> letter;
if(islower(letter))
{
letter = toupper(letter);
cout << letter;
}
}
return 0;
}