partial_sort_copy() Function in C++

This C++ program demonstrates using partial_sort_copy() algorithm. The algorithm partially sorts the container elements and copies the sorted elements into another container according to the capacity of the second container.

Here is the source code of the C++ program which demonstrates using partial_sort_copy() algorithm. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C++ Program to demonstrate the partial_sort_copy() algorithm

```
 */
```
```
#include <algorithm>
```
```
#include <vector>
```
```
#include <functional>
```
```
#include <iostream>
```
```
using namespace std; 
```
```
 
```
```
void print(vector<int> & v)
```
```
{
```
```
    vector<int>::iterator it;
```
```
 
```

    for (it = v0.begin(); it != v0.end(); it++) {

```
        cout << *it << ' ';
```
```
    }
```
```
    cout << '\n';
```
```
}
```
```
 
```
```
int main()
```
```
{
```
```
    vector<int> v0{4, 2, 5, 1, 3};
```
```
    vector<int> v1{10, 11, 12};
```

    vector<int> v2{10, 11, 12, 13, 14, 15, 16};

```
 
```
```
    cout << "v0 : ";
```
```
    print(v0);
```
```
 
```
```
    cout << "v1 : ";
```
```
    print(v1);
```
```
 
```
```
    cout << "v2 : ";
```
```
    print(v2);
```
```
 
```

    it = partial_sort_copy(v0.begin(), v0.end(), v1.begin(), v1.end());

```
 
```

    cout << "Writing v0 to v1 in ascending order gives: ";

```
    print(v1);
```
```
 
```

    it = partial_sort_copy(v0.begin(), v0.end(), v2.begin(), v2.end(),

                                std::greater<int>());

```
 
```

    cout << "Writing v0 to v2 in descending order gives: ";

```
    print(v2);
```
```
}
```

$ gcc test.cpp
$ a.out
v0 : 4 2 5 1 3 
v1 : 10 11 12 
v2 : 10 11 12 13 14 15 16 
Writing v0 to v1 in ascending order gives: 1 2 3 
Writing v0 to v2 in descending order gives: 5 4 3 2 1 15 16

Sanfoundry Global Education & Learning Series – 1000 C++ Programs.

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