第三章 字符串、向量和数组

 1 #include <iostream>
 2 #include <string>
 3 
 4 using std::cin;
 5 using std::cout;    
 6 using std::endl;
 7 using std::string;
 8 
 9 int main() 
10 {
11     string line;
12     while (getline(cin, line))
13         cout << line << endl;
14     return 0;
15 }

 1 #include <iostream>
 2 #include <string>
 3 
 4 using std::cin;
 5 using std::cout;    
 6 using std::endl;
 7 using std::string;
 8 
 9 int main() 
10 {
11     string word;
12     while (cin >> word)
13         cout << word << endl;
14     return 0;
15 }

 1 #include <iostream>
 2 #include <string>
 3 
 4 using std::cin;
 5 using std::cout;    
 6 using std::endl;
 7 using std::string;
 8 
 9 void is_equal(string &s1, string &s2)
10 {
11     if (s1 == s2) {
12         cout << s1 << " is equal to " << s2 << endl;
13     }
14     else {
15         if (s1 < s2)    cout << s1 << " is smaller than " << s2 << endl; 
16         else    cout << s1 << " is bigger than " << s2 << endl;
17     }
18 }
19 
20 void is_same_length(string &s1, string &s2)
21 {
22     if (s1.size() == s2.size()){
23         cout << s1 << "‘s length is equal to " << s2 << endl ;
24     }
25     else {
26         if (s1.size() < s2.size())    cout << s1 << "‘s length is shorter than " << s2 << endl;
27         else    cout << s1 << "‘s length is longer than " << s2 << endl;
28     }
29 } 
30 
31 int main() 
32 {
33     string s1, s2;
34     cin >> s1 >> s2;
35     is_equal(s1, s2);
36     is_same_length(s1, s2); 
37     return 0;
38 }

 1 #include <iostream>
 2 #include <string>
 3 
 4 using std::cin;
 5 using std::cout;    
 6 using std::endl;
 7 using std::string;
 8 
 9 void solve1()
10 {
11     string s1, s2 = "";
12     while (getline(cin, s1)) {
13         s2 += s1;
14         cout << s2 << endl; 
15     }
16 }
17 
18 void solve2()
19 {
20     string s1, s2 = "";
21     while (getline(cin, s1)) {
22         s2 = s2 + s1 + " ";
23         cout << s2 << endl;
24     }
25     
26 }
27 
28 int main() 
29 {
30     solve1();
31     solve2();
32     return 0;
33 }