hello everyone,c++ how check class object is not a specified class[results posted]

Question

2.00/5 (2 votes)

See more:

such as:

C++

class MyString
{
public:
    MyString();
};
class MyStringA
{
public :
    MyStringA();
}
int main()
{
    MyString *pStr=new MyString;
    MyStringA *pStrA=new MyStringA;
    if(pStrA==Mystring) ??????how check pStrA class object belong MyString Class object
    {
        cout << "Be MyString"<<endl;
    }
    else
    {
        cout << "not MyString"<<endl;
    }
}

englist only poor,Thank you to answer!
c++ fan!;

Posted 17-Feb-12 18:09pm

C++Kernel

Updated 17-Feb-12 18:48pm

v4

Add a Solution

3 solutions

Solution 5

Use rtti. U will perhaps be using typeid or dyn cast

Posted 18-Feb-12 19:33pm

Rahul Rajat Singh

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

వేంకటనారాయణ(venkatmakam) · Accepted Answer · 2012-02-17T18:43:00

Solution 1

Check C++ Run-time type information

Posted 17-Feb-12 18:43pm

వేంకటనారాయణ(venkatmakam)

Yerasel · Accepted Answer · 2012-02-18T03:17:00

C++

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

// Debug in
// Code::Blocks 10.05
// GCC 4.4.1
// 2012-2-18
class MyString
{
public:
    MyString(){}  // Default Implementation
};

class MyStringA
{
public :
    MyStringA(){}  // // Default Implementation
}; // you forgot a semicolon here

int main()
{
    MyString *pStr = new MyString;
    MyStringA *pStrA = new MyStringA;
    if(typeid(*pStrA) == typeid(MyStringA)) // do the check
    {
       cout << "Be MyString"<<endl;
    }
    else
    {
        cout << "not MyString"<<endl;
    }
}