ValArray Program in C++

This C++ program illustrates the use of valarrays. These are data types designed for efficient numeric computations like scalar multiplication, addition, subtraction, division, modulus, bit-shifting and all sorts of numerical computations. The program initializes a valarray and constructs another from the same valarray. Operations like scalar addition and bit-shifting have been performed on these valarrays.

Here is the source code of the C++ program illustrates the use of valarrays. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C++ Program to Illustrate use of ValArrays

```
 */
```
```
#include <iostream>
```
```
#include <valarray>
```
```
 
```
```
void print(std::valarray <int> v)
```
```
{
```
```
    std::cout << "Valarray = { ";
```
```
    for (int i = 0; i < v.size(); i++)
```
```
        std::cout << v[i] << "  ";
```
```
    std::cout << "}" << std::endl;
```
```
}
```
```
 
```
```
int main()
```
```
{
```

    int array[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

    std::valarray <int> v(array, sizeof(array) / sizeof(int));

```
 
```
```
    print(v);
```
```
    v = v << 1;
```

    std::cout << "After bit-shifting by 1 :"

```
              << std::endl; 
```
```
    print(v);
```
```
    v = v + 1;
```

    std::cout << "After adding 1 to all elements of valarray :"

```
              << std::endl;
```
```
    print(v);
```
```
}
```

$ a.out
Valarray = { 1  2  3  4  5  6  7  8  9  10  }
After bit-shifting by 1 :
Valarray = { 2  4  6  8  10  12  14  16  18  20  }
After adding 1 to all elements of valarray :
Valarray = { 3  5  7  9  11  13  15  17  19  21  }

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