1 # include<iostream>
2 # include<map>
3 # include<cstdio>
4 using namespace std;
5 struct myComp
6 {
7 bool operator()(const int &a, const int &b)
8 {
9 if(a!=b)
10 {
11 return a>b;
12 }
13 else
14 {
15 return a>b;
16 }
17 }
18 };
19 struct Info
20 {
21 string name;
22 float score;
23 bool operator < (const Info &a)const
24 {
25 return a.score < score;
26 }
27 };
28 int main(int argc,const char * argv[])
29 {
30 /*----------------------------------------*/
31 //map创建，元素的插入和遍历
32 //map<string,float>m;
33 //m["Jack"] = 98.5;
34 //m["Bomi"] = 96.0;
35 //m["Kate"] = 97.5;
36 //map<string,float>::iterator it;
37
38 //for(it = m.begin();it!=m.end();it++)
39 //{
40 // cout<<(*it).first<<":"<<(*it).second<<endl;
41 //}
42
43 /*---------------------------------------*/
44 //删除元素
45 //map<int,char>m;
46 //m[25] = 'm';
47 //m[28] = 'k';
48 //m[10] = 'x';
49 //m[30] = 'a';
50 //m.erase(28);
51
52 //map<int,char>::iterator it;
53 //for(it = m.begin();it!=m.end();it++)
54 //{
55 // cout<<(*it).first<<":"<<(*it).second<<endl;
56 //}
57
58
59
60 /*----------------------------------------*/
61 //元素的反向逆序
62 //map<int,char>m;
63 //m[25] = 'm';
64 //m[28] = 'k';
65 //m[10] = 'x';
66 //m[30] = 'a';
67
68 //map<int,char>::reverse_iterator it;
69 //for(it = m.rbegin();it!=m.rend();it++)
70 //{
71 // cout<<(*it).first<<":"<<(*it).second<<endl;
72 //}
73
74
75 /*----------------------------------------*/
76 //元素的搜索
77 //map<int,char>m;
78 //m[25] = 'm';
79 //m[28] = 'k';
80 //m[10] = 'x';
81 //m[30] = 'a';
82
83 //map<int,char>::iterator it;
84 //it = m.find(28);
85 //if(it!=m.end())
86 //{
87 // cout<<(*it).first<<":"<<(*it).second<<endl;
88 //}
89 //else
90 //{
91 // cout<<"not find it"<<endl;
92 //}
93
94
95 /*-------------------------------------------*/
96 //自定义的比较函数
97 //map<int,char,myComp>m;
98 //m[25] = 'm';
99 //m[28] = 'k';
100 //m[10] = 'x';
101 //m[30] = 'a';
102
103 //map<int,char,myComp>::iterator it;
104 //for(it = m.begin();it!=m.end();it++)
105 //{
106 // cout<<(*it).first<<":"<<(*it).second<<endl;
107 //}
108
109
110 /*------------------------------------------*/
111 //另一种定义方法
112 //map<Info,int>m;
113 //Info info;
114 //info.name = "Jack";
115 //info.score = 60;
116 //m[info] = 10;
117 //info.name = "Peti";
118 //info.score = 66.5;
119 //m[info] = 30;
120 //map<Info,int>::iterator it;
121 //for(it = m.begin();it!=m.end();it++)
122 //{
123 // cout<<(*it).second<<":";
124 // cout<<((*it).first).name<<" "<<((*it).first).score<<endl;
125 //}
126
127 /*------------------------------------------*/
128 //用map实现数字分离
129 //map<char,int>m;
130 //m['0'] = 0;
131 //m['1'] = 1;
132 //m['2'] = 2;
133 //m['3'] = 3;
134 // m['4'] = 4;
135 // m['5'] = 5;
136 // m['6'] = 6;
137 // m['7'] = 7;
138 // m['8'] = 8;
139 // m['9'] = 9;
140
141 /*
142 for(int j = 0;j < 10;j++)
143 {
144 m[0+'j'] = j;
145 }
146 */
147 // string sa,sb;
148 // sa = "6234";
149 //int i;
150 //int sum = 0;
151 //for(i = 0;i < sa.length();i++)
152 //{
153 // sum+=m[sa[i]];
154 // }
155 // cout<<"sum = "<<sum<<endl;
156
157
158 /*--------------------------------------------*/
159 //数字映射字符
160 map<int ,char>m;
161 m[0] = '0';
162 m[1] = '1';
163 m[2] = '2';
164 m[3] = '3';
165 m[4] = '4';
166 m[5] = '5';
167 m[6] = '6';
168 m[7] = '7';
169 m[8] = '8';
170 m[9] = '9';
171
172 /*
173 for(int j = 0;j < 10;j++)
174 {
175 m[j] = '0'+j;
176 }
177 */
178 int n = 7;
179 string s="The number is";
180 cout<<s+m[n]<<endl;
181
182
183
184
185
186
187 }
