1 #include <iostream>
2 #include <map>
3 #include <string>
4
5 using namespace std;
6
7 int main(void)
8 {
9 map<string, string> data;
10
11 data["a"] = "aaa";
12 data["b"] = "bbb";
13 data["c"] = "ccc";
14 data["d"] = "ddd";
15 data["e"] = "eee";
16 data["f"] = "fff";
17 data["g"] = "ggg";
18
19 for (map<string, string>::iterator iter = data.begin(); iter != data.end(); ++iter)
20 {
21 cout << iter->first << ", " << iter->second << endl;
22 }
23 cout << "----------------------------" << endl;
24 for (map<string, string>::iterator iter = data.begin(); iter != data.end();)
25 {
26 cout << "execute key: " << iter->first << endl;
27 if ("g" == iter->first)
28 {
29 // windows STL支持返回值返回指向下一个元素指针
30 iter = data.erase(iter);
31 }
32 else
33 {
34 ++iter;
35 }
36 }
37 cout << "----------------------------" << endl;
38 for (map<string, string>::iterator iter = data.begin(); iter != data.end(); ++iter)
39 {
40 cout << iter->first << ", " << iter->second << endl;
41 }
42 }
1 for (map<string, string>::iterator iter = data.begin(); iter != data.end();)
2 {
3 cout << "execute key: " << iter->first << endl;
4 if ("g" == iter->first)
5 {
6 // windows和g++ STL均支持i自增方式
7 data.erase(iter++);
8 }
9 else
10 {
11 ++iter;
12 }
13 }
1 for (map<string, string>::iterator iter = data.begin(); iter != data.end();)
2 {
3 cout << "execute key: " << iter->first << endl;
4 if ("g" == iter->first)
5 {
6 // windows和g++ STL均支持临时变量的方式，此种方式等效于自增变量方式
7 map<string, string>::iterator copy = iter;
8 ++iter;
9 data.erase(copy);
10 }
11 else
12 {
13 ++iter;
14 }
15 }
