C++ Program to Demonstrate using Multiplies Function Object

This C++ program demonstrates using multiplies arithmetic function object. Tbe program creates two vectors with integer elements and multiplies them using ‘multiplies’ function object which is passed as a parameter to the transform algorithm which multiplies the corresponding elements and stores the product in the third vector.

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

```
/*
```

 * C++ Program to demonstrate using multiplies function object

```
 */
```
```
#include <iostream>
```
```
#include <algorithm>
```
```
#include <vector>
```
```
#include <functional>
```
```
#include <iterator>
```
```
#include <iomanip>
```
```
using namespace std;
```
```
 
```
```
typedef const vector <int>& vecref;
```
```
 
```

void print(vecref a, vecref b, vecref c)

```
{
```

    cout << "a[i]   b[i]   c[i]" << endl;

```
    for(int i = 0; i < a.size(); i++)
```
```
    {
```

        cout << setw(2) << setfill('0') << a[i] << "  *  "

             << setw(2) << setfill('0') << b[i] << "  =  "

             << setw(2) << setfill('0') << c[i] << endl;

```
    }
```
```
}
```
```
 
```
```
int main()
```
```
{
```
```
    vector <int> a(10), b(10), c(10);
```
```
 
```
```
    for (int i = 0; i < 10 ;i++)
```
```
    {
```
```
        a[i] = (i % 5 + 1);
```
```
        b[i] = (i % 4 + 1);
```
```
    }
```
```
    // Save the result in vector c
```

    cout << "Multiplication using \'multiplies\' arithmetic function object"

```
         << endl;
```

    transform(a.begin(), a.end(), b.begin(), c.begin(), multiplies <int>());

```
    print(a, b, c);
```
```
}
```

$ a.out
Multiplication using 'multiplies' arithmetic function object
a[i]   b[i]   c[i]
01  *  01  =  01
02  *  02  =  04
03  *  03  =  09
04  *  04  =  16
05  *  01  =  05
01  *  02  =  02
02  *  03  =  06
03  *  04  =  12
04  *  01  =  04
05  *  02  =  10

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

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