?? virfunc.cpp
字號:
//THE PROGRAM IS TO REALITY THE USE OF THE VIRTUAL METHOD
//FILE VIRFUNC.CPP
#include <stdio.h>
#include <conio.h>
class PARENT
{
protected:
int DATA;
public:
virtual void READ_NUM()
{
printf("\nNow,this is function in PARENT");
printf("\nInput a number please:");
scanf("%d",&DATA);
}
virtual int GET_NUM()
{
printf("Now,this is function in PARENT");
return DATA;
}
};
class DERIVED:public PARENT
{
protected:
int DATA;
public:
void READ_NUM()
{
printf("\nNow,this is function in DERIVED");
printf("\nInput a number please:");
scanf("%d",&DATA);
}
int GET_NUM()
{
printf("Now,this is function in DERIVED");
return DATA;
}
};
int main(void)
{
int NUM;
PARENT *P,X;
DERIVED Y;
clrscr();
P=&X;
P->READ_NUM();
NUM=P->GET_NUM();
printf("\nNUM (PARENT) =%d\n",NUM);
P=&Y;
P->READ_NUM();
NUM=P->GET_NUM();
printf("\nNUM (DERIVED) =%d\n",NUM);
getch();
return 0;
}
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