ex3_06.cpp

// Use a range for to change all the characters in a string to X.

#include <iostream>
#include <string>

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

int main()
{
    string str("a simple string");
    for (auto& c : str) c = 'X';
    cout << str << endl;

    return 0;
}