Set in C++ STL - Sanfoundry

This C++ Program demonstrates implementation of Set in Stl.

Here is source code of the C++ Program to demonstrate Set in Stl. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```
```
 * C++ Program to Implement Set in Stl
```
```
 */
```
```
#include <iostream>
```
```
#include <set>
```
```
#include <string>
```
```
#include <cstdlib>
```
```
using namespace std;
```
```
int main()
```
```
{
```
```
    set<int> st;
```
```
    set<int>::iterator it;
```
```
    int choice, item;
```
```
    while (1)
```
```
    {
```

        cout<<"\n---------------------"<<endl;

        cout<<"Set Implementation in Stl"<<endl;

        cout<<"\n---------------------"<<endl;

        cout<<"1.Insert Element into the Set"<<endl;

        cout<<"2.Delete Element of the Set"<<endl;

        cout<<"3.Size of the Set"<<endl;

        cout<<"4.Find Element in a Set"<<endl;

        cout<<"5.Dislplay by Iterator"<<endl;

```
        cout<<"6.Exit"<<endl;
```
```
        cout<<"Enter your Choice: ";
```
```
        cin>>choice;
```
```
        switch(choice)
```
```
        {
```
```
        case 1:
```

            cout<<"Enter value to be inserted: ";

```
            cin>>item;
```
```
            st.insert(item);
```
```
            break;
```
```
        case 2:
```

            cout<<"Enter the element to be deleted: ";

```
            cin>>item;
```
```
            st.erase(item);
```
```
            break;
```
```
        case 3:
```
```
            cout<<"Size of the Set: ";
```
```
            cout<<st.size()<<endl;
```
```
            break;
```
```
        case 4:
```

	    cout<<"Enter the element to be found: ";

```
	    cin>>item;
```
```
            it = st.find(item);
```
```
	    if (it != st.end())
```

                cout<<"Element "<<*it<<" found in the set" <<endl;

```
            else
```

                cout<<"No Element Found"<<endl;

```
            break;
```
```
        case 5:
```

            cout<<"Displaying Map by Iterator: ";

            for (it = st.begin(); it != st.end(); it++)

```
            {
```
```
                cout << (*it)<<" ";
```
```
            }
```
```
            cout<<endl;
```
```
            break;
```
```
        case 6:
```
```
            exit(1);
```
```
	    break;
```
```
        default:
```
```
            cout<<"Wrong Choice"<<endl;
```
```
        }
```
```
    }
```
```
    return 0;
```
```
}
```

$ g++ set.cpp
$ a.out
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 1
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 2
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 3
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 4
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 5
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 4
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 3
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 2
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 1
Enter value to be inserted: 1
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 3
Size of the Set: 5
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 5
Displaying Map by Iterator: 1 2 3 4 5 
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 4
Enter the element to be found: 3
Element 3 found in the set
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 2
Enter the element to be deleted: 5
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 3
Size of the Set: 4
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 5
Displaying Map by Iterator: 1 2 3 4 
 
---------------------
Set Implementation in Stl
 
---------------------
1.Insert Element into the Set
2.Delete Element of the Set
3.Size of the Set
4.Find Element in a Set
5.Dislplay by Iterator
6.Exit
Enter your Choice: 6
 
 
------------------
(program exited with code: 1)
Press return to continue