Set_Union in C++ - Sanfoundry

This C++ Program demonstrates implementation of Set_Union in STL.

Here is source code of the C++ Program to demonstrate Set_Union 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_Union in Stl

```
 */
```
```
#include <iostream>
```
```
#include <algorithm>
```
```
#include <vector>
```
```
using namespace std;
```
```
int main ()
```
```
{
```
```
    int first[] = {5,10,15,20,25};
```
```
    int second[] = {50,40,30,20,10};
```
```
    vector<int> v(10);
```
```
    vector<int>::iterator it;
```
```
    sort (first, first + 5);
```
```
    sort (second, second + 5);
```

    it = set_union (first, first + 5, second, second + 5, v.begin());

```
    v.resize(it - v.begin());
```

    cout << "The union has " << (v.size()) << " elements: "<<endl;

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

```
        cout<< *it<<"  ";
```
```
    cout <<endl;
```
```
    return 0;
```
```
}
```

$ g++ set_union.cpp
$ a.out
The union has 8 elements: 
5  10  15  20  25  30  40  50  
 
 
------------------
(program exited with code: 0)
Press return to continue

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