关于指针析构的问题

︷起↘嚸℡

//类的声明和定义
class Student  
{
public:
    void Display();
    Student(int num,char *name);
    virtual ~Student();

protected:
    int m_nNum;
    char *m_pstrName;
    const char m_cGender;

};
Student::Student(int num,char *name):m_cGender('F')
{
    m_nNum = num;

    char *m_pstrName = new char;
    strcpy(m_pstrName, name);

}
Student::~Student()
{
    delete m_pstrName;
}
void Student::Display()
{
    cout << "Number is " << m_nNum << endl;
    cout << "Gender is " << m_cGender << endl;
    cout << "Name is " << m_pstrName << endl;
}
//主函数
#include <iostream>
#include "Student.h"

using namespace std;

int main()
{
    Student st(11,"wangj");

    st.Display();

    return 0;
}
Display中前两句输出能顺利执行,但执行到后一句时
系统总是提示:"0x00421980"指令引用的"0xcccccccc"内存.该内存不能为"read".