关于Map的应用实例

#include"stdafx.h"#include<iostream>#include<string>#include<map>using namespace std;#if 0map<string, int> m_map = { { "DBF", 1209 }, { "DAW", 1202 } };  //初始化赋值typedef map<string, int>::iterator iter;int main(){//m_mapm_map.insert(pair<string,int>("DF1", 1990));     //pair是一个模板类m_map.insert(make_pair("DYW1", 1991));           //make_pair 返回的是一个pair对象m_map.insert(map <string, int>::value_type("DG", 23));m_map.insert(pair<string, int>("DD", 2990));auto it = m_map.begin();while (it != m_map.end()){cout <<it->first<<"="<< it->second << endl;it++;}cout << "mapzie= " << m_map.size() << endl;/*判断插入的是成功*/pair<iter, bool> inPair;inPair = m_map.insert(make_pair("DYW111", 1992));if (inPair.second == true){cout << "insert Suceed!" << endl;}else{cout << "inseret failed" << endl;}/*end*/iter  it2 = m_map.find("DBF");if (it2 != m_map.end()){cout << it2->second << endl;}iter it3 = m_map.lower_bound("DA"); //找到大于等于"DA"的迭代器iter it4 = m_map.upper_bound("DF"); //找到大于"DF"的迭代器/*删除map中多个数据*/for (; it3 != it4; ){cout << "Data" << it3->second << endl;iter itdel = it3;it3++;m_map.erase(itdel);it4 = m_map.upper_bound("DF");}it = m_map.begin();while (it != m_map.end()){cout << it->first << "=" << it->second << endl;it++;}/*删除map中全部数据*/m_map.erase(m_map.begin(), m_map.end());cout << "mapzie= " << m_map.size() << endl;system("pause");}#endiftypedef struct MyStruct{int nID;string name;bool operator<( const MyStruct &stru) const {return nID < stru.nID ? true : false;}}StuInfo;map<StuInfo, int> m_stu;int main2(){StuInfo s1 = { 16, "DF" };StuInfo s2 = { 13, "DYW" };/*s1.name = "DF";s1.nID = 12;s2.name = "DYW";s2.nID = 13;*/m_stu.insert(make_pair(s1, 300));m_stu.insert(make_pair(s2, 200));auto it = m_stu.begin();while (it!= m_stu.end()){cout << (it->first).name<< endl;it++;}cout << "hello<<endl" << endl;system("pause");return  0;}