inheritance problem

[cmk128]

Hi

#include <stdio.h>
#include <string>
using namespace std;

class mother{
private:
string str;
public:
mother(){
str="peter cheung";
}

string getStr(){
return str;
}
};

class childublic mother{
};

class child2ublic child2{
};

void func1(mother *m){
}

int main(){
mother *m=new child2(); <------------ this will fail, but
this can, mother *m=new child()
child2 c;
printf("str=%s\n",m->getStr().c_str());
func1(&c); <------------- this will fail too
because c is from class child2, not child . java can accept parameter
of all its sub-class, whatever how depth it is inheritanced. do we have
anyway to solve it?
return 1;
}

thanks
from Peter ([email protected])

 

[tragomaskhalos]

Hi [snip]
mother(){
str="peter cheung";
}

Better: mother() : str("peter cheung") {}

[snip]

class child2ublic child2{
};

Correcting the above to "class child2ublic child{" makes the program
behave as expected.

 

[Noah Roberts]

class child2ublic child2{
};

That can't be right. What is your intention?

 

[cmk128]

Noah Roberts 寫é“：

That can't be right. What is your intention?

sorry, typing mistake, "class child2ublic child" is working.
thanks

 

[ZikO]

class child2ublic child2{

Everything looks fine if you change child2 on child, I mean this:

class child2ublic child2{

on this:

class child2ublic child {

All the rest looks fine and compiles correctly, as far as the result of this
program is what you wanted to have .