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请告诉我为什么这段代码有运行时错误的原因。 我认为addEmployee()函数是问题。C++ - 运行时错误:vector push_back()
#include <iostream>
#include <vector>
#include <string>
using namespace std;
enum EmployeeLevel {fresh, sophomore, junior, senior};
class Employee {
string name;
EmployeeLevel level;
public:
Employee(const string & _name, const EmployeeLevel _level)
: name(_name) {
level = _level;
}
Employee(const Employee & employee) {
name = employee.name;
level = employee.level;
}
void changeLevel() {
level = static_cast<EmployeeLevel> (level + 1);
}
};
class Manager: public Employee {
vector<Employee *> group;
public:
Manager(const string & _name, const EmployeeLevel _level)
: Employee(_name, _level) {}
~Manager() {
for (vector<Employee *>::iterator it = group.begin(); it != group.end(); ++it)
delete *it;
}
void addEmployee(Employee * employee) {
group.push_back(employee);
}
};
int main(void)
{
Employee e1("홍", fresh), e2("김", sophomore), e3("차", fresh);
Manager m1("Tom", senior);
m1.addEmployee(&e1);
}
如果我修改函数(addEmployee()),如下所示,不是错误。 但我想知道为什么使用“push_back(employee)”有运行时错误的原因。
void addEmployee(Employee * employee) {
Employee * tempEmployee = new Employee(*employee);
group.push_back(tempEmployee);
}
我使用Dev-C++版本5.11 – doubleU
不是你的问题_now_,但'Manager'的默认拷贝构造函数会复制'group'中的_pointers_。这很糟糕,因为〜Manager会删除它们两次。解决方案:'管理器(经理常量&)=删除'删除该默认复制ctor。 – MSalters