Modify a member by static_cast cause segmentation fault
I have the next program: if I comment the assignation mNum=num; or mCh=ch the segmentation fault don't exist.
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#include <vector>
class Base{
public:
Base(){};
~Base();
void setNum(int num){
mNum=num;
}
int getNum();
protected:
int mNum;
};
class Derived:public Base{
public:
Derived(){};
~Derived();
void setChar(char ch){
mCh=ch;
}
char getChar();
protected:
int mCh;
};
class One{
public:
One(int type){
switch(type) {
case 0:
mBase= new Base();
break;
case 1:
mBase= new Derived();
break;
}
};
void SetNumber(){
Base* b = static_cast<Base*>(mBase);
b->setNum(1);
};
void SetChar(){
Derived* d = static_cast<Derived*>(mBase);
d->setChar('r');
};
~One();
private:
Base *mBase;
};
class Two{
public:
Two(){};
~Two();
void print1(){
mOnes.push_back(NULL);
mOnes.push_back(NULL);
mOnes[0]=new One(1);
mOnes[1]=new One(2);
mOnes[0]->SetNumber();
mOnes[1]->SetChar();
};
private:
std::vector<One*> mOnes;
};
int main(){
Two *mTwo=new Two();
mTwo->print1();
}
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Last edited on
Please enclose your code in code tags, so that it's more readable. Edit your post, and use the "<>" button to the right of the edit window.
You pass the value 2 to the One constructor when it expects 0 or 1.
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