程序代码：

/*
动态输入学生个数，并输入姓名，学号，和一门成绩！
*/
#include "stdio.h"
#include "stdlib.h"
struct STUDENT
{
    int number;
    char name[15];
    int score;
};
void main()
{
    printf("Hello World!\n");
    struct STUDENT *p;//这要不要用*p=NULL;
    int n;
    printf("Please enter n:");
    scanf("%d", &n);
    p=(struct STUDENT *)malloc(sizeof(struct STUDENT)*n);
    if(p==NULL)
    {
        printf("No enough memory!\n");
        exit(0);
    }
    for(i=0; i < n; i++)
    {
        printf("Please enter the student's number:");
        scanf("%d", p.number);
        printf("Please enter the student's name:");
        scanf("%s", p.name);
        printf("Please enter the student's score:");
        scanf("%d", p.score);
    }
    for(i=0; i < n; i++)
    {
        printf("姓名:%s\n学号:%d\n成绩:%d\n", p.name, p.number, p.score);
    }
    free(p);
    return 0;
}
//错误在哪里，如何改正？要注意什么？
//想问下，如果输入多门成绩，要如何修改？

程序代码：

// stuctor.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "stdlib.h"
struct STUDENT
{
    int number;
    char name[15];
    int score;
};
int main(int argc, char* argv[])
{
    printf("Hello World!\n");
    struct STUDENT *p;//这要不要用*p=NULL;
    int n, i;
    printf("Please enter n:");
    scanf("%d", &n);
    p=(struct STUDENT *)malloc(sizeof(struct STUDENT)*n);
    if(p==NULL)
    {
        printf("No enough memory!\n");
        exit(0);
    }
    for(i=0; i < n; i++)
    {
        printf("Please enter the student's number:");
        scanf("%d", (p+i).number);
        printf("Please enter the student's name:");
        scanf("%s", (p+i).name);
        printf("Please enter the student's score:");
        scanf("%d", (p+i).score);
    }
    for(i=0; i < n; i++)
    {
        printf("姓名:%s\n学号:%d\n成绩:%d\n", *(p+i).name, *(p+i).number, *(p+i).score);
    }
    free(p);
    return 0;
}