C++ primer(第五版） 练习 3.22 个人code

for(auto it = text.cbegin(); it != text.cend() && !it->empty(); ++it)
cout << *it << endl;

#include <iostream>
#include <string>

using std::cout;
using std::cin;
using std::endl;
using std::string;

int main()
{
string text("This is an example,"
"in order to write this program, "
"an example of it, in order to achieve "
"the first section are rewritten into "
"uppercase letters, and then output it.");

for (auto it = text.begin(); it != text.end(); ++it)
*it = toupper(*it);

cout << text << endl;

return 0;

}