is-programmer — Tue, 29 Nov 2011 05:47:00 GMT

写这�D�代码时遇到了几个困难：
1�Q�对STL不熟悉，或者可以说一知半解吧�?br />2�Q�明��算法后�Q�居然不会用一些数据结构表�C�出来�?br />3�Q�对于无限��@环，可以用两个结构�P代下厅R�?span class="Apple-style-span" style="font-size: 13px; background-color: #eeeeee; "> 1 #include<iostream>

  2 #include<string>
  3 #include<set>
  4 #include<cstdlib>
  5 using namespace std;
  6 bool testFront(string a, string b){
  7   for(int i = 0 ; i < b.length(); i++)
  8     if(b[i] != a[i])
  9       return false;
10   return true;
11 }
12 string getLast(string a,string b){
13   string t(a.length() - b.length(),0);
14   for(int i = 0 ; i <t.length() ; i++)
15     t[i] = a[i + b.length()];
16   return t;
17 }
18
19 int main(){
20   int count,cnt;
21   set<string> container;
22   string temp;
23   cout << "输入码字集的大小" << endl;
24   cin >> count;
25   cout <<"输入码字的个�?/span>" << endl;
26   cin >> cnt;
27   cout << "逐个输入码字" << endl;
28   for(int i = 1; i <= cnt; i++){
29     cin >> temp;
30     if(container.find(temp) != container.end()){
31       cout << "奇异码！" << endl;
32       exit(1);
33     }
34     else container.insert(temp);
35   }
36   cout << "非奇异码�Q?/span>" << endl;
37   //craft
38   double res = 0;
39   set<string> f;
40   set<string> ::iterator i,j;
41   for( i = container.begin();
42       i != container.end();i++){
43     double temp = 1;
44     for(int j = 1; j <= (*i).length(); j++)
45       temp *= count;
46     res += (1/temp);
47   }
48   if(res > 1){
49     cout << "不满��craft不等�?/span>" << endl;
50     exit(1);
51   }
52   else cout <<  "满��craft不等�?/span>" << endl;
53   int flag = 1;
54   for( i = container.begin();
55        i != container.end();i++){
56     j= i;
57     j++;
58     for( ;j != container.end();j++){
59       string a,b;
60       if((*i).length() > (*j).length()){
61     a = *i;
62     b = *j;
63       }
64       else {
65     a = *j;
66     b = *i;
67       }
68       if(testFront(a,b)){
69     cout << b <<"�?/span>" << a  << "的前�~�" << endl;
70     flag = 0;
71     string t = getLast(a,b);
72     if(!t.empty()){
73       f.insert(t);
74       if(container.find(t) != container.end()){
75         cout << " 不是唯一可译码！" ;
76         cout << t << "在C内！"<<endl;
77         exit(1);
78       }
79     }
80       }
81     }
82   }
83   if(!flag)
84     cout << "不是��x��码！" <<endl;
85   else  {
86     cout << "是即时码�Q?/span>" << endl;
87     exit(1);
88   }
89   set<string> ft1(f),ft2;
90   int tc = 1;
91   while(1){
92     cout << tc << ':';
93     tc ++;
94     int flag = 0;
95     for(i = ft1.begin(); i != ft1.end();i++){
96       for(j = container.begin();
97       j != container.end();j++){
98     string a,b;
99     if((*i).length() > (*j).length()){
100       a = *i;
101       b = *j;
102     }
103     else {
104       a = *j;
105       b = *i;
106     }
107     if(testFront(a,b)){
108       string t = getLast(a,b);
109       if(container.find(t) != container.end()){
110         cout << "不是唯一可译码！"  <<t << "在C�?/span>" <<  endl;
111         exit(1);
112       }
113       if(f.find(t) == f.end())
114         ft2.insert(t);
115     }
116       }
117     }
118     if(ft2.empty()){
119       cout << "是唯一可译�?/span>"  << endl;
120       exit(1);
121     }
122     for(i = ft1.begin();i != ft1.end();i++){
123       f.insert(*i);
124       cout << *i << ' ';
125     }
126     ft1.clear();
127     ft1 = ft2;
128     ft2.clear();
129   }
130 }
131

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