字符

虽然char数据类型为整数（并因此遵循所有的规则，我们正整数）通常是以不同的方式比整数字符正常工作。人物可以拿一个小数目，或者一封从ASCII字符集。ASCII代表美标信息交换代码，它定义之间的键映射在美国的一个键盘和1和127之间的数（称为码）。例如，字母“A”映射到代码97。B是98码。人物总是放在单引号。

下面的两个任务做同样的事情：

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char chValue = 'a';
char chValue2 = 97;
cout outputs char type variables as characters instead of numbers.

The following snippet outputs ‘a’ rather than 97:

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char chChar = 97; // assign char with ASCII code 97
cout << chChar; // will output 'a'
If we want to print a char as a number instead of a character, we have to tell cout to print the char as if it were an integer. We do this by using a cast to have the compiler convert the char into an int before it is sent to cout:

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char chChar = 97;
cout << (int)chChar; // will output 97, not 'a'

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#include "iostream";
 
int main()
{
    using namespace std;
    char chChar;
    cout << "Input a keyboard character: ";
    cin >> chChar;
    cout << chChar << " has ASCII code " << (int)chChar << endl;
}