fill() Function in C++

This C++ program demonstrates the fill() algorithm. The program uses function fill() to fill a container within specified iterator ranges. The function takes iterator to the beginning and end of the container and the value to be filled.

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

```
/*
```

 * C++ Program to demonstrate fill() algorithm

```
 */
```
```
#include <algorithm>
```
```
#include <vector>
```
```
#include <iostream>
```
```
#include <iomanip>
```
```
 
```
```
void print(const std::vector <int>& v)
```
```
{
```

    std::vector <int>::const_iterator i;

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

```
    {
```

        std::cout << std::setw(2) <<  *i << " ";

```
    }
```
```
    std::cout << std::endl;
```
```
}
```
```
 
```
```
int main()
```
```
{
```

    int arr[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

    std::vector <int> v(arr, arr + sizeof(arr) / sizeof(int));

```
 
```

    std::cout << "Vector before fill" << std::endl;

```
    print(v);
```

    std::fill(v.begin() + 4, v.end() - 3, -1);

    std::cout << "Vector after fill" << std::endl;

```
    print(v);
```
```
}
```

$ a.out
Vector before fill
 0  1  2  3  4  5  6  7  8  9 
Vector after fill
 0  1  2  3 -1 -1 -1  7  8  9

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

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