#include<stdio.h>
#include<stdlib.h>

int add(int *stu,int student);
int del(int *stu,int student);
void print(int *stu,int student);
void esc();

int student=0;

void main()
{
    while(1)
    {
        int *stu=NULL;
        int option;
        printf("------------------请输入您进入的选项------------------\n");
        printf("1.新增学员人数  2.删除学员  3.打印学员成绩  4.退出程序\n ");
        scanf(" %d",&option);
        switch (option)
        {
            case 1:
                {
                    add(stu,student);
                    break;
                }
            case 2:
                {
                    del(stu,student);
                    break;
                }
            case 3:
                {
                    print(stu,student);
                    break;
                }
            case 4:
                {
                    esc();
                    break;
                }
        }
    free( stu);
    }
   
}
int add(int *stu,int student)
{
    int i;
    char a;
    int student_a;
    printf("请输入新增学员的人数\n");
    scanf(" %d",&student);
    while(student<=0)
    {
        printf("您输入有误，请从新输入\n");
        scanf(" %d",&student);
    }
    stu=(int *)malloc(student*sizeof(int));
    printf("请输入学员的成绩\n");
    for(i=0;i<student;i++)
    {
        scanf(" %d",stu+i);
    }
    printf("继续增加学员人数，请输入y，退出请输入n\n");
    scanf(" %c",&a);
    do
    {
        if(a=='y'||a=='Y')
        {
            printf("输入新增学员人数 \n");
            scanf(" %d",&student_a);
            while(student<0)
            {
                printf("您输入有误，请从新输入\n");
                scanf(" %d",&student_a);
            }
            student+=student_a;
            stu=(int *)realloc(stu,student*sizeof(int));
            printf("请输入新增学员的分数\n");
            for(i=student-student_a;i<student;i++)
            {
                scanf(" %d",stu+i);
            }
            printf("继续增加学员人数，请输入y，退出请输入n\n");
            scanf(" %c",&a);
        }
        if(a=='n'||a=='N')
        {
            //exit(0);
            return 0;
        }
    }
    while(a!='y');
    {
        exit(0);
    }
    return *stu;
}
int del(int *stu,int student)//这个全局变量为什么是零？而下面的打印函数的全局变量又是有的？？
{
    int id;
    int i;
    printf("请输入要删除学生的学号\n");
    scanf(" %d",&id);
    while(id<=0||id>student)
    {
        printf("您输入有误，请从新输入\n");
        scanf(" %d",&id);
    }
    if(student==1)
    {
        free(stu);
    }
    if(id==student)
    {
        stu=(int *)realloc(stu,(student-1)*sizeof(int));
    }
    else
    {
        student=student-1;
        for(i=id;i<student+1;i++)
        {
            *(stu+i)=*(stu+i+1);
        }
        stu=(int *)realloc(stu,student*sizeof(int));
    }
    return *stu;
}
void print(int *stu,int student)
{
    int i;
    for(i=0;i<student;i++)
    {
        printf("第%d个学员的成绩：%d",i+1,*(stu+i));
    }
}
void esc()
{
    exit(0);
}

大虾~！指点一下~~~谢谢了~~~
 

各位大哥~！怎么看了一晚上的贴不回贴~~~~难道我的这个问题  你们不屑于回答吗~~~
       至少给个反应撒~~谢谢了~~~！

等我电脑修好了~就把改的发给你们看一下，谢谢给位大家的支持~~~
   同时请大家指点一下~~~~
  还有那些地方需要改进的地方   谢谢大家