C++ 语言
dynamic_cast(expression)出错
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我也要 关注 + 加入社区#include <iostream>
using namespace std;
class employee
{
public:
virtual void salary(){cout<<"in salary of employee\n";}
};
class programmer : public employee
{
public:
void salary(){cout<<"in salary of programmer\n";};
void bonus(){cout<<"in bonus of programmer\n";}
};
class company
{
public:
void payroll(employee* pe);
};
int main(int argc, char* argv[])
{
company IBM;
employee *pe=NULL;
pe = new employee;
IBM.payroll(pe);
delete pe;
return 0;
}
void company::payroll(employee *pe)
{
programmer *pm = dynamic_cast<programmer*>(pe);//程序运行到这一句不正常终止，为什么，对指针转换，就算不成功也应该是使pm=null啊，怎么好像我运行是抛出异常
if ( pm )
{
pm->bonus;
}
else
{
pm->salary();
}
}
using namespace std;
class employee
{
public:
virtual void salary(){cout<<"in salary of employee\n";}
};
class programmer : public employee
{
public:
void salary(){cout<<"in salary of programmer\n";};
void bonus(){cout<<"in bonus of programmer\n";}
};
class company
{
public:
void payroll(employee* pe);
};
int main(int argc, char* argv[])
{
company IBM;
employee *pe=NULL;
pe = new employee;
IBM.payroll(pe);
delete pe;
return 0;
}
void company::payroll(employee *pe)
{
programmer *pm = dynamic_cast<programmer*>(pe);//程序运行到这一句不正常终止，为什么，对指针转换，就算不成功也应该是使pm=null啊，怎么好像我运行是抛出异常
if ( pm )
{
pm->bonus;
}
else
{
pm->salary();
}
}
...全文
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