C++ //string字符串拼接

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 1 //string字符串拼接
 2 #include <iostream>
 3 #include<string>
 4 
 5 using namespace std;
 6 
 7 
 8 void test01()
 9 {
10     string str1 = "我";
11 
12     str1 += "爱学习";
13     cout << "str1 = " << str1 << endl;
14 
15     str1 += '?';
16     cout << "str1 = " << str1 << endl;
17 
18     string str2 = "LOL CF";
19     str1 += str2;
20     cout << "str1 = " << str1 << endl;
21 
22 
23 
24     string str3 = "I ";
25     str3.append("love");
26     cout << "str3 = " << str3 << endl;
27 
28     str3.append(" Game abced", 5);
29     cout << "str3 = " << str3 << endl;
30 
31     //str3.append( str2);
32     //str3.append(str2, 0, 3);//0的位置开始 截取3 LOL
33 
34     str3.append(str2, 4, 3);//截取 cf 
35     cout << "str3 = " << str3 << endl;
36 
37 
38 }
39 
40 
41 int main()
42 {
43     test01();
44 
45     system("pause");
46 }

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