20、C++编程实战：从基础到应用

C++编程实战：从基础到应用

在C++编程中，我们会遇到各种各样的问题和需求。下面将通过一系列的示例代码和练习，深入探讨C++编程的多个方面。

1. 输入姓名并输出问候语

以下代码实现了让用户输入姓名，并根据姓名长度输出相应问候语的功能。

const int nm_size = 128;  
char user_name[nm_size];  
cout << "Please enter your name: ";  
cin  >> setw(nm_size) >> user_name;  

switch (strlen(user_name))  
{  
    // same case labels for 0, 1  
    case 127:  
        // maybe string was truncated by setw()  
        cout << "That is a very big name, indeed -- "  
             << "we may have needed to shorten it!\n"  
             << "In any case,\n";  
        // no break -- we fall through ...  
    default:  
        // the 127 case drops through to here -- no break  
        cout << "Hello, " <