1        set
     
      s1; 2     multiset
      
       s2; 3     int  x; 4     for(int i=1;i<=3;i++) 5     { 6         scanf("%d",&x); 7         s1.insert(x); 8         s2.insert(x); 9     }10     for(auto it=s1.begin();it!=s1.end();it++){11         cout<<*it<
      
     

inserteraseclearcount

 

1 //遍历 2 set
     
      s; 3 int  main() 4 { 5    for(int  i=1;i<=3;i++) s.insert(i); 6    for(auto x :s) printf("%d\n",x); 7 } 8 1 9 210 3
     

 

 

1 char c; 2 int n,y; 3 set
     
      se; 4 set
      
       ::iterator it1,it2,it3; 5 int  main() 6 {   7   for(int i=1;i<=5;i++){ 8       se.insert(i); 9   }10  11   it1 = se.begin();12   it2 = se.begin();13   it2++;it2++;14   se.erase(it1,it2);[)15   printf("%d\n",*it2);16 17   for(it3=se.begin();it3!=se.end();it3++) printf("%d\n",*it3);18     return 0;19 }