程序清单3.6 morechar.cpp

// morechar.cpp -- the char type and int contrasted
#include <iostream>

int main()
{
    using namespace std;
    char ch = 'M';
    int i = ch;
    cout << "The ASCII code for " << ch << " is " << i << endl;

    cout << "Add one to the character code: " << endl;
    ch = ch + 1;
    i = ch;
    cout << "The ASCII code for " << ch << " is " << i << endl;

    // using the cout.put() member function to display a char
    cout << "Displaying char ch using cout.put(): ";
    cout.put(ch);
    cout.put('!');

    cout << endl << "Done" << endl;

    return 0;
}

输出：

The ASCII code for M is 77
Add one to the character code: 
The ASCII code for N is 78
Displaying char ch using cout.put(): N!
Done