C++ Program to Demonstrate Splice Operation on Lists

This C++ program demonstrates the splice operation on std::list container. The splice operation removes the elements from one std::list and copies them into another. The program uses two versions of std::list::splice – one which moves only the element pointed by an iterator and second which moves the elements between the beginning and ending iterators.

Here is the source code of the C++ program which demonstrates the splice operation on std::list container. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C++ Program to Demonstrate Splice Operation on Lists

```
 */
```
```
#include <iostream>
```
```
#include <list>
```
```
#include <algorithm>
```
```
#include <string>
```
```
using namespace std;
```
```
 
```
```
void print(list<string>& l)
```
```
{
```

    list<string>::const_iterator i = l.begin();

```
 
```
```
    while(i != l.end()) {
```
```
        cout << *i << "  ";
```
```
        i++;
```
```
    }
```
```
    cout << "\n";
```
```
}
```
```
 
```
```
int main() {
```
```
    list<string> l1, l2;
```
```
 
```
```
    l1.push_back(string("John Keats"));
```

    l1.push_back(string("William Wordsworth"));

    l1.push_back(string("Walt Whitman"));

    l1.push_back(string("Robert Frost"));

    l1.push_back(string("William Shakespeare"));

    l1.push_back(string("Percy Shelley"));

```
    cout << "List 1 : ";
```
```
    print(l1);
```
```
    cout << "List 2 : ";
```
```
    print(l2);
```
```
 
```

    l2.splice(l2.end(), l1, l1.begin());

    cout << "After l2.splice(l2.end(), l1, l1.begin());\n";

```
    cout << "List 1 : ";
```
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    print(l1);
```
```
    cout << "List 2 : ";
```
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    print(l2);
```
```
 
```

    l2.splice(l2.begin(), l1, ++(l1.begin()), --(l1.end()));

    cout << "After l2.splice(l2.begin(), l1, ++(l1.begin()), --(l1.end()));\n";

```
    cout << "List 1 : ";
```
```
    print(l1);
```
```
    cout << "List 2 : ";
```
```
    print(l2);
```
```
}
```

$ gcc test.cpp
$ a.out
List 1 : John Keats  William Wordsworth  Walt Whitman  Robert Frost  William Shakespeare  Percy Shelley  
List 2 : 
After l2.splice(l2.end(), l1, l1.begin());
List 1 : William Wordsworth  Walt Whitman  Robert Frost  William Shakespeare  Percy Shelley  
List 2 : John Keats  
After l2.splice(l2.begin(), l1, ++(l1.begin()), --(l1.end()));
List 1 : William Wordsworth  Percy Shelley  
List 2 : Walt Whitman  Robert Frost  William Shakespeare  John Keats

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

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