方法：先繼承類然后映射函數(shù)。
#include <iostream.h>
class animal
{
public:
animal(char thename);
};
animal::animal(char thename)
{
char name;
cout<<thename<<endl;
}
class pig:public animal //先繼承類，并在次寫上子類映射函數(shù)
{
public:
pig(char thename);
};
pig::pig(char thename):animal(thename) //后映射函數(shù)。注意父類函數(shù)此時(shí)無(wú)需再定義數(shù)據(jù)類型
{
}
class turtle:public animal
{
public:
turtle(char thename);
};
turtle::turtle(char thename):animal(thename)
{
}
int main()
{
pig st('M');
turtle sm('n');
return 0;
}