循环两次就是死循环了

#include <stdio.h>

struct Student
{
int nId ;
char cName[50] ;
int nCpp ;
Student *pNext ;
};

Student *pHeader = NULL ;

void main()
{
Student *pNew = new Student ;


int nKey = 0 ;
while(0 == nKey)
{

printf("输入学生的信息:");
scanf("%d %s %d",&pNew->nId,pNew->cName,&pNew->nCpp);

pNew->pNext = NULL ;

if(pHeader == NULL)
{
pHeader = pNew ;
}
else
{
Student *pNode = pHeader ;
for( ;pNode->pNext != NULL ; pNode = pNode->pNext);
pNode->pNext = pNew ;
}

printf("请继续输:");
scanf("%d",&nKey);
}
//显示
Student *pNode = pHeader ;
printf("Id\tName\tCpp\n");
for ( ;pNode != NULL ; pNode = pNode->pNext)
{
printf("%d\t%s\t%d\n",pNode->nId,pNode->cName,pNode->nCpp);
}
pNode = pHeader ;

//释放空间

Student *pTemp = NULL ;
for(pNode=pHeader ; pNode != NULL ; pNode = pTemp )
{
pTemp = pNode->pNext ;
delete pNode ;
}
pHeader = NULL ;

}

我犹豫发帖以后机子坏了,所以没有再讨论这个问题了,今天又有时间再研究了
我上次报错的原因是 我没有循环一次再在堆里申请一个空间,就造成了上叙错误
正确的代码是


#include <stdio.h>

struct Student
{
int nId ;
char cName[50] ;
int nCpp ;
Student *pNext ;
};

Student *pHeader = NULL ;

void main()
{



int nKey = 0 ;
while(0 == nKey)
{
Student *pNew = new Student ;

printf("输入学生的信息:");
scanf("%d %s %d",&pNew->nId,pNew->cName,&pNew->nCpp);

pNew->pNext = NULL ;

if(pHeader == NULL)
{
pHeader = pNew ;
}
else
{
Student *pNode = pHeader ;
for( ;pNode->pNext != NULL ; pNode = pNode->pNext);
pNode->pNext = pNew ;
}

printf("请继续输(0是继续,非0 是退出):");
scanf("%d",&nKey);
}
//显示
Student *pNode = pHeader ;
printf("Id\tName\tCpp\n");
for ( ;pNode != NULL ; pNode = pNode->pNext)
{
printf("%d\t%s\t%d\n",pNode->nId,pNode->cName,pNode->nCpp);
}
pNode = pHeader ;

//释放空间

Student *pTemp = NULL ;
for(pNode=pHeader ; pNode != NULL ; pNode = pTemp )
{
pTemp = pNode->pNext ;
delete pNode ;
}
pHeader = NULL ;

}