C++ Program to Demonstrate Usage of bind1st Binder

This C++ program demonstrates the usage of bind1st binder. The program binds the first parameter of the binary predicate greater and less to 7. A vector of integers is instantiated and whether there is an element greater than 7 and any element equal to 7 is determined.

Here is the source code of the C++ program which demonstrates the usage of bind1st binder. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C++ program to demonstrate usage of bind1st binder

```
 */
```
```
#include <iostream>
```
```
#include <algorithm>
```
```
#include <functional>
```
```
#include <vector>
```
```
 
```
```
using std::cout;
```
```
using std::endl;
```

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

```
 
```
```
void print(const std::vector <int>& v)
```
```
{
```
```
    const_iterator i;
```

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

```
    {
```
```
        std::cout << *i << " ";
```
```
    }
```
```
    std::cout << std::endl;
```
```
}
```
```
 
```
```
int main()
```
```
{
```
```
    std::vector <int> v(10);
```
```
    const_iterator p;
```
```
 
```
```
    for(int i = 0; i < 10; i++)
```
```
    {
```
```
        v[i] = i % 8;
```
```
    }
```
```
    cout << "Vector : ";
```
```
    print(v);
```

    p = find_if(v.begin(), v.end(), std::bind1st(std::greater <int>(), 7));

```
    if (p != v.end())
```
```
    {
```

        std::cout << "Element less than or equal to 7 => "

                  << *p << " at position " << p - v.begin() + 1

```
                  << std::endl;
```
```
    }
```
```
    else
```
```
    {
```

        std::cout << "No element less than or equal to 7"

```
                  << std::endl;
```
```
    }
```

    p = find_if(v.begin(), v.end(), std::bind1st(std::less <int>(), 7));

```
    if (p != v.end())
```
```
    {
```

        std::cout << "Element greater than or equal to 7 => "

                  << *p << " at position " << p - v.begin() + 1

```
                  << std::endl;
```
```
    }
```
```
    else
```
```
    {
```

        std::cout << "No element greater than or equal to 7"

```
                  << std::endl;
```
```
    }
```
```
}
```

$ a.out
Vector : 0 1 2 3 4 5 6 7 0 1 
Element less than or equal to 7 => 0 at position 1
No element greater than or equal to 7

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

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