C++ 질문합니다.. 왜 터지는지 모르겠어요...

문자열 입력 받는 부분에서 터지는것 같은데.. 왜 터지는지 모르겠습니다..

// test.cpp : 콘솔 응용 프로그램에 대한 진입점을 정의합니다.

#include "stdafx.h"

class C_STUDENT

{

private:

int m_nId;

int m_nScore;

char *m_szName;

public:

C_STUDENT();

void createBuffer(int nSize);

void setnId (int nId);

void setnScore (int nScore);

void setszName (char * szName);

void setData (int nId, int nScore, char * szName);

int getnId();

int getnScore();

char getszName();

};

int _tmain(int argc, _TCHAR* argv[])

{

C_STUDENT cStudent;

cStudent.createBuffer(64);

cStudent.setnId(1);

cStudent.setnScore(20);

cStudent.setszName("김철수");

printf("%d\n",cStudent.getnId());

printf("%d\n",cStudent.getnScore());

printf("%s\n",cStudent.getszName());

return 0;

}

C_STUDENT::C_STUDENT ()

:m_nId(0),

m_nScore(0),

m_szName(NULL)

{

}

void C_STUDENT::createBuffer(int nSize)

{

m_szName = new char (nSize);

}

void C_STUDENT::setnId (int nId)

{

m_nId = nId;

}

void C_STUDENT::setnScore (int nScore)

{

m_nScore = nScore;

}

void C_STUDENT::setszName (char * szName)

{

m_szName = szName;

}

void C_STUDENT::setData (int nId,int nScore,char * szName)

{

m_nId = nId;

m_nScore = nScore;

m_szName = szName;

}

int C_STUDENT::getnId()

{

return m_nId;

}

int C_STUDENT::getnScore()

{

return m_nScore;

}

char C_STUDENT::getszName()

{

return *m_szName;

}