1 #include<iostream>
2 #include<string>
3 #include<vector>
4 using namespace std;
5 void jiema(string s)
6 {
7 cout << "解码之后为：" << endl;
8 for(int i = 0; i < s.size(); i++)
9 {
10 if(s[i + 1] == '*')
11 {
12 int j = i + 1;
13 int len = 0;
14 while(s[j + 1] >= 48 && s[j + 1] <= 57)
15 {
16 len++;
17 j = j + 1;
18 }
19 string temp = s.substr(i + 2, len);
20 int num = atoi(temp.c_str());
21 for(int k = 0; k < num; k++)
22 {
23 cout << s[i];
24 }
25 i = j;
26 }
27 else
28 {
29 cout << s[i];
30
31 }
32 }
33 }
34 void bianma(string s)
35 {
36 vector<char>A;
37 int p = 1;
38 int j = 0;
39 for(; j < s.size();)
40 {
41 while(s[j] == s[j + 1] && j < s.size())
42 {
43 p++;
44 j = j + 1;
45 }
46 if(p >= 4)
47 {
48 A.push_back(s[j]);
49 A.push_back('*');
50 A.push_back(p);
51 p = 1;
52 j = j + 1;
53 }
54 else if(p < 4)
55 {
56 for(int k = 0; k < p; k++)
57 {
58 A.push_back(s[j]);
59 }
60 p = 1;
61 j = j + 1;
62 }
63 }
64 cout << "编码之后为：" << endl;
65 for(int b = 0; b < A.size(); b++)
66 {
67 if(A[b] >= 0 && A[b] <= 9)
68 cout << int(A[b]);
69 else
70 cout << A[b];
71 }
72 cout << endl;
73 cout << "压缩比为：" << endl;
74 double y = double(A.size()) / s.size();
75 cout << y << endl;
76 }
77 void main()
78 {
79 cout << "请输入代码：①代码中含有数字表示需要解码解压缩②代码中不含数字表示需要编码压缩" << endl;
80 string s;
81 for(; cin >> s;)
82 {
83 int i = 0;
84 for(; i < s.size(); i++)
85 {
86 if(s[i] >= 48 && s[i] <= 57) //解码
87 {
88 jiema(s);
89 break;
90 }
91 }
92 if(i == s.size())
93 {
94 bianma(s);
95 }
96 }
97 }
