Chapter 1 Working with strings

Posted 2020-06-11

1.1 Input

 1 // ask for a person‘s name, and greet the person
 2 #include <iostream>
 3 #include <string>
 4 
 5 int main()
 6 {
 7     // ask for a person‘s name
 8     std::cout << "Please enter your name : " ;
 9 
10     // read the name
11     std::string name; // define name
12     std::cin >> name; // read into 
13 
14     // write a greeting
15     std::cout << "Hello, "<< name << " ! " << std::endl;
16     return 0;
17 }
18 
19 /*
20 在VC6.0中的运行的结果是：
21 --------------------------------
22 Please enter your name : Andrew
23 Hello, Andrew !
24 --------------------------------
25 */

 

1.2 Framing a name

 1 // ask for a person‘s name, and generate a framed greeting 
 2 #include <iostream>
 3 #include <string>
 4 
 5 int main()
 6 {
 7     std::cout << "Please enter your name : " ;
 8     std::string name; 
 9     std::cin >> name;
10 
11     // build the message that we intend to write
12     const std::string greeting = "Hello , " + name + "!" ;
13 
14     // build the second and fourth lines of the output
15     const std::string spaces(greeting.size(), ‘ ‘);
16     const std::string second = "*" + spaces + "*";
17 
18     // build the first and fifth lines of the output
19     const std::string first(second.size(), ‘*‘);
20 
21     // write it all
22     std::cout << std::endl;
23     std::cout << first << std::endl;
24     std::cout << second << std::endl;
25     std::cout << "*" << greeting << "*" << std::endl;
26     std::cout << second << std::endl;
27     std::cout << first << std::endl;
28     return 0;
29 }
30 
31 /*
32 在VC6.0中的运行的结果是：
33 --------------------------------
34 Please enter your name : X_man
35 
36 ****************
37 *              *
38 *Hello , X_man!*
39 *              *
40 ****************
41 --------------------------------
42 */