C++ Program to Demonstrate using Unary Arithmetic Function Object

This C++ program demonstrates using unary arithmetic function object. Tbe program creates a vector with integer elements and negates them using ‘negate’ function object which is passed as a parameter to the transform algorithm which negates the corresponding elements and stores the value in the second vector.

Here is the source code of the C++ program which demonstrates using unary arithmetic function object. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
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 * C++ Program to demonstrate using unary arithmetic function objects

```
 */
```
```
#include <iostream>
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```
#include <algorithm>
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#include <vector>
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#include <functional>
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#include <iterator>
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#include <iomanip>
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using namespace std;
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```
 
```
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typedef const vector <int>& vecref;
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```
 
```
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void print(vecref a, vecref b)
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```
{
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    cout << "a[i]  negate(a[i])" << endl;

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    for(int i = 0; i < a.size(); i++)
```
```
    {
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        cout << setw(3) << setfill(' ') << a[i]

             << setw(7) << setfill(' ') << b[i]

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             << endl;
```
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    }
```
```
}
```
```
 
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int main()
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```
{
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    vector <int> a(10), b(10);
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```
 
```
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    for (int i = 0; i < 10 ;i++)
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```
    {
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```
        a[i] = i + 1;
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    }
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```
    // Save the result in vector c
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    transform(a.begin(), a.end(), b.begin(), negate <int>());

    cout << "Negation using \'negate\' arithmetic function object"

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         << endl;
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    print(a, b);
```
```
}
```

$ a.out
Negation using 'negate' arithmetic function object
a[i]  negate(a[i])
  1     -1
  2     -2
  3     -3
  4     -4
  5     -5
  6     -6
  7     -7
  8     -8
  9     -9
 10    -10