一、概述:
ASCII码由基本字符和数字组成,共256个,包括字母:A~B、a~b、数字:0~9、字符:诸如%,@,$,#等,功能键诸如del、space等
二、程序示例
2.1,以下程序演示输入字符并打印出来
// chartype.cpp -- the char type
#include <iostream>
int main( )
{
using namespace std;
char ch; // declare a char variable
cout << "Enter a character: " << endl;
cin >> ch;
cout << "Hola! ";
cout << "Thank you for the " << ch << " character." << endl;
// cin.get();
// cin.get();
return 0;
}
2.2以下程序输入对应字符,程序将输出对应的assii码值(整数)
// morechar.cpp -- the char type and int type contrasted
#include <iostream>
int main()
{
using namespace std;
char ch = 'M'; // assign ASCII code for M to ch
int i = ch; // store same code in an int
cout << "The ASCII code for " << ch << " is " << i << endl;
cout << "Add one to the character code:" << endl;
ch = ch + 1; // change character code in ch
i = ch; // save new character code in i
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(ch): ";
cout.put(ch);
// using cout.put() to display a char constant
cout.put('!');
cout << endl << "Done" << endl;
// cin.get();
return 0;
}