program to Remove duplicate character from a string

//this program uses the function of string library

#include <iostream>
#include <string>
using namespace std;

int main()
{
    string str1 = "silicon ABC ADC BCA";
    string str2;
    int pos;

    for(int i = 0; i < str1.length(); i++)
    {
        if( (pos = str2.find(str1[i])) < 0)
            str2 += str1[i];
    }

    cout << str2 << endl;
    return 0;
}

OUPUT:

Online software training website

1. lynda.com
2. wibit.net
3. pluralsight
4. vtc
5. tutsplus
6. video to brain
7. infinity skills
8. udemy
9. informIT

List of IDE/Compilers for c++ environment in linux or windows

Linux:

1. GCC
2. Code::Block IDE (using GCC for compilation)
3. EclipseIDE
4. Net beans IDE
5. QT framework

Windows: 

1. Visual c++
2. Dev c++
3. Code::block IDE (using GCC for compilation)
4. MinGW (GCC version for windows)  
5. Eclipse IDE
6. Net beans IDE
7. MinGW64
8. Visual studio .net framework
9. QT framework

Cross Platforms:

1. Eclipse IDE (linux, windows, mac)
2. Net beans IDE (linux, windows)
3. Code::block IDE (linux, windows)
4. QT framework

Some useful link related to compiler:

1. MinGw compiler with Boost library support. 
2. GCC or MinGW command syntax.

code to understand Pure Virtual Function

#include <iostream>
using namespace std;

class Cat{
    public:
        int mAge;
        int mWeight;
       
        virtual void innoculate()=0;
};

class Persian: public Cat
{
    public:
        virtual void innoculate()
        {
            cout << "successful innoculated" << endl;
        }
};

int main()
{
        //Cat c2; gives error: because Cat is a abstract class
    Persian c1;
    c1.innoculate();
    return 0;
}

OUTPUT: