/*  第14章 multimap多重映照容器   14.1 multimap技术原理   14.2 multimap应用基础   14.3 本章小结*///  第14章 multimap多重映照容器//   14.1 multimap技术原理 ------------------------------------------------------------------------------//   14.2 multimap应用基础 ------------------------------------------------------------------------------//212 插入、遍历#include <map>#include <iostream>int main(void){  using namespace std;  multimap < float, char * > mm;  mm.insert(pair < float, char * > (3.0f, "apple"));  mm.insert(pair < float, char * > (3.0f, "pear"));  mm.insert(pair < float, char * > (2.6f, "orange"));  mm.insert(pair < float, char * > (1.8f, "banana"));  mm.insert(pair < float, char * > (6.3f, "lichee"));  //遍历打印  multimap < float, char * > ::iterator i, iend;  iend = mm.end();  for(i = mm.begin(); i != iend; i++)    cout << (*i).second << ‘ ‘ << (*i).first << "元/斤\n";  cout << endl;  return 0;}//213 反向遍历#include <map>#include <iostream>int main(void){  using namespace std;  multimap < float, char * > mm;  mm.insert(pair < float, char * > (3.0f, "apple"));  mm.insert(pair < float, char * > (3.0f, "pear"));  mm.insert(pair < float, char * > (2.6f, "orange"));  mm.insert(pair < float, char * > (1.8f, "banana"));  mm.insert(pair < float, char * > (6.3f, "lichee"));  //反向遍历打印  multimap < float, char * > ::reverse_iterator r_i, r_iend;  r_iend = mm.rend();  for(r_i = mm.rbegin(); r_i != r_iend; r_i++)    cout << (*r_i).second << ‘ ‘ << (*r_i).first << "元/斤\n";  return 0;}//214#include <map>#include <iostream>struct CourseRecord{  //课程记录结构体  struct CourseInfo  {    //课程信息结构体    char *course; //课程名    int period; //学时    char *required; //必修或选修  };  char *teacher; //任课教师  CourseInfo cf; //课程信息  CourseRecord(char *teacher_, char *course_, int period_, char *required_)  {    teacher = teacher_;    cf.course = course_;    cf.period = period_;    cf.required = required_;  }};int main(void){  using namespace std;  //创建multimap容器对象mm  typedef multimap < char *, CourseRecord::CourseInfo > coursemmap;  coursemmap mm;  //插入第1条记录  CourseRecord course1 = CourseRecord("王强", "操作系统开发", 60, "必修");  pair < char *, CourseRecord::CourseInfo > pairCourse1(course1.teacher,    course1.cf);  mm.insert(pairCourse1);  //插入第2条记录  CourseRecord course2 = CourseRecord("李文", "编译器开发", 30, "必修");  pair < char *, CourseRecord::CourseInfo > pairCourse2(course2.teacher,    course2.cf);  mm.insert(pairCourse2);  //插入第3条记录  CourseRecord course3 = CourseRecord("李文", "数据结构", 20, "必修");  pair < char *, CourseRecord::CourseInfo > pairCourse3(course3.teacher,    course3.cf);  mm.insert(pairCourse3);  //插入第4条记录  CourseRecord course4 = CourseRecord("李文", "Java开发应用", 38, "选修");  pair < char *, CourseRecord::CourseInfo > pairCourse4(course4.teacher,    course4.cf);  mm.insert(pairCourse4);  //插入第5条记录  CourseRecord course5 = CourseRecord("张键", "pascal语言", 26, "选修");  pair < char *, CourseRecord::CourseInfo > pairCourse5(course5.teacher,    course5.cf);  mm.insert(pairCourse5);  //记录搜索  cout << "搜索<李文老师>的任课记录:\n";  pair < coursemmap::iterator, coursemmap::iterator > p = mm.equal_range("李文")    ;  //打印  coursemmap::iterator i;  for(i = p.first; i != p.second; i++)    cout << (*i).first << ‘    ‘ << (*i).second.course << ‘    ‘ << (*i)      .second.period << "学时   " << (*i).second.required << ‘    ‘ << endl;  cout << endl << endl;  return 0;}//215#include <map>#include <iostream>int main(void){  using namespace std;  multimap < int, char > mm;  cout << mm.size() << endl; //打印:0  mm.insert(pair < int, char > (3, ‘a‘));  mm.insert(pair < int, char > (3, ‘c‘));  mm.insert(pair < int, char > (6, ‘f‘));  cout << mm.count(3) << endl; //打印:2  cout << mm.size() << endl; //打印:3  return 0;}//   14.3 本章小结 ------------------------------------------------------------------------------