1. //插入元素 //四种插入方法比较
  2. void display()
  3. {
  4. map< int, string> m;
  5. pair< map< int, string>::iterator, bool> pair1 ,pair2,pair3;
  6. //1.方法
  7. pair1 = m.insert(pair< int, string>( 1, "teacher01"));
  8. pair2 = m.insert(pair< int, string>( 2, "teacher02"));
  9. pair3 = m.insert(pair< int, string>( 2, "teacher02"));
  10. if (pair2.second)
  11. {
  12. cout<< "2 teacher02插入成功"<< endl;
  13. cout<<pair2.first->first<< ":"<<pair2.second<< endl;
  14. }
  15. else
  16. {
  17. cout<< "2 teacher02插入失败"<< endl;
  18. cout<<pair2.first->first<< ":"<<pair2.second<< endl;
  19. }
  20. if (pair3.second)
  21. {
  22. cout<< "2 teacher02插入成功"<< endl;
  23. cout<<pair3.first->first<< ":"<<pair3.second<< endl;
  24. }
  25. else
  26. {
  27. cout<< "2 teacher02插入失败"<< endl;
  28. cout<<pair3.first->first<< ":"<<pair3.second<< endl;
  29. }
  30. //2.方法
  31. m.insert(make_pair( 3, "teacher03"));
  32. m.insert(make_pair( 4, "teacher04"));
  33. //3.方法
  34. m.insert( map< int, string>::value_type( 5, "teacher05"));
  35. m.insert( map< int, string>::value_type( 6, "teacher06"));
  36. //4. 如果key相等 会修改对应的value
  37. m[ 7] = "teacher07";
  38. m[ 8] = "teacher08";
  39. m[ 0] = "teacher09";
  40. m[ 0] = "teacher00";
  41. //遍历
  42. for ( map< int, string>::iterator it = m.begin();it!=m.end();it++)
  43. {
  44. cout<<(*it).first<< endl;
  45. cout<<(*it).second<< endl;
  46. }
  47. while (!m.empty())
  48. {
  49. map< int, string>::iterator it = m.begin();
  50. cout<<it->first<< "\t"<<it->second<< endl;
  51. m.erase(it);
  52. }
  53. }

                  </div>
</article>
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