简单的学生成绩管理系统001版。求意见。
程序代码：/* */ // 首部声明
/* */ // 头文件&宏定义
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <malloc.h>
#include <windows.h>
#include <time.h>
#define LEN sizeof(StuInfo)
/* */ // 结构体
typedef struct StuInfo
{
int order; // 序号
char stu_id[16]; // 学号
char name[16]; // 姓名
char sex[4]; // 性别
float score[3]; // 数学成绩 英语成绩 c语言成绩
float ave; // 学生平均成绩
float sum; // 总成绩
struct StuInfo *next;
}StuInfo;
/* */ // 模块声明
void menu();
StuInfo *input();
void output(StuInfo *);
void search(StuInfo *);
StuInfo *del(StuInfo *);
StuInfo *modify(StuInfo *);
StuInfo *order_sort(StuInfo *);
void quit();
/* */ // 主函数
int main(void)
{
int i, select;
char password[12];
StuInfo *head = NULL;
printf("************************************************************\n");
printf("**********************欢迎进入学生成绩管理系统**************\n");
printf("************************************************************\n");
for(i = 1; i < 5; i++)
{
printf("\n请输入密码:");
gets(password);
if (strcmp(password, "1") == 0)
{
while(1)
{
menu(); // 进入主界面
printf("请选择:");
do{
scanf("%d", &select);
}while (select < 1 || select > 7);
switch (select)
{
case 1: head = input(); break;
case 2: output(head); break;
case 3: search(head); break;
case 4: head = del(head); break;
case 5: head = modify(head); break;
case 6: head = order_sort(head); break;
case 7: quit(); break;
}
system("pause");
system("cls");
}
}
else
{
printf("密码错误请第%d次输入:", i + 1);
gets(password);
}
}
if (5 == i)
{
printf("密码验证失败!\n");
exit(0);
}
return 0;
}
void menu()
{
printf("********************************\n");
printf("********欢迎进入主菜单**********\n");
printf("********************************\n");
printf("\n本系统有如下功能:\n");
printf("1. 学生信息录入\n");
printf("2. 学生信息输出\n");
printf("3. 学生信息查询\n");
printf("4. 学生信息删除\n");
printf("5. 学生信息修改\n");
printf("6. 学生信息排序\n");
printf("7. 退出系统\n");
printf("\n");
}
StuInfo *input()
{
StuInfo *head = NULL, *p;
int i, flag = 1; float s = 0;
system("cls");
while (1)
{
p = (StuInfo *)malloc(LEN);
printf("\n请输入学生的序号:");
scanf("%d", &p -> order);
if (p -> order <= 0) break;
printf("\n请输入学生的学号:");
scanf("%s", p -> stu_id);
printf("\n请输入学生的姓名:");
scanf("%s", p -> name);
printf("\n请输入学生的性别:");
scanf("%s", p -> sex);
printf("\n请输入3门课的成绩:");
for (i = 1; i <= 3; i++)
{
switch (i)
{
case 1: printf("\n请输入数学成绩:"); break;
case 2: printf("\n请输入英语成绩:"); break;
case 3: printf("\n请输入c语言成绩:"); break;
}
scanf("%f", &p -> score[i - 1]);
while (p ->score[i - 1] < 0 || p -> score[i - 1] > 100)
{
printf("\n错误的输入,请重新输入:");
scanf("%f", &p -> score[i - 1]);
}
}
for (i = 1; i <= 3; i++)
s += p -> score[i];
p -> sum = s;
p -> ave = s / 3;
p -> next = head;
head = p;
}
return (head);
}
void output(StuInfo *head)
{
StuInfo * p;
int count = 0; // 统计学生数
p = head;
if (p == NULL)
printf("这是个空表，没有任何学生信息!\n");
else
{
printf("**********************学生信息***************************************\n");
printf("序号\t学号\t姓名\t性别\t数学\t英语\tc语言\n");
printf("-----------------------------------------------------------------\n");
while (p != NULL)
{
printf("%d\t%s\t%s\t%s\t%.2f\t%.2f\t%.2f\n", p -> order, p -> stu_id,
p -> name, p -> sex, p -> score[0], p -> score[1], p -> score[2]);
p = p -> next;
count++;
}
printf("************************共有%d个学生信息**************************\n", count);
printf("**************************** 结束 ********************************\n");
}
}
void search(StuInfo *head)
{
StuInfo *p;
int count = 0;
char subname[16]; // 存放姓名
system("cls");
printf("请输入你要查找的姓名:");
scanf("%s", subname);
p = head; //头指针赋予移到指针
printf("序号\t学号\t姓名\t性别\t数学\t英语\tc语言\n");
printf("--------------------------------------------------------------------\n");
while (p != NULL)
{
if (strcmp(p -> name, subname) == 0)
{
count++;
printf("%d\t%s\t%s\t%s\t%.2f\t%.2f\t%.2f\n", p -> order, p -> stu_id,
p -> name, p -> sex, p -> score[0], p -> score[1], p -> score[2]);
}
p = p -> next;
}
printf("\n********找到%d个****************************************************\n", count);
if (count == 0)
printf("没有这个名字的学生信息!\n");
}
StuInfo *del(StuInfo *head)
{
StuInfo *p, *q;
int count = 0;
char subname[16]; // 存放姓名
system("cls");
printf("请输入你要删除的学生姓名:");
scanf("%s", subname);
if (head == NULL)
{
printf("这是个空表，没有任何学生信息!\n");
return(NULL);
}
if (strcmp(head -> name, subname) == 0)
{
head = head -> next;
count++;
}
else
{
q = p = head;
p = p -> next;
while (p != NULL)
{
if (strcmp(p -> name, subname) == 0)
{
q -> next = p -> next;
p = q -> next;
count++;
}
else
{
q = p;
p = p -> next;
}
}
}
if (count == 0)
printf("没有这个名字的学生信息!\n");
else
printf("\n********删除了%d个学生信息*******************************************\n", count);
return head;
}
StuInfo *modify(StuInfo *head)
{
StuInfo *p, *q;
int suborder; // 需要修改的序号
int i;
float s;
if (head == NULL)
{
printf("这是个空表，没有任何学生信息!\n");
return(NULL);
}
system("cls");
printf("请输入你要修改的学生序号: ");
scanf("%d", &suborder);
p = q = head;
while (p != NULL)
{
if (p -> order == suborder)
{
printf("\n请重新输入学生的学号:");
scanf("%s", p -> stu_id);
printf("\n请重新输入学生的姓名:");
scanf("%s", p -> name);
printf("\n请重新输入学生的性别:");
scanf("%s", p -> sex);
printf("\n请重新输入3门课的成绩:");
for (i = 1; i <= 3; i++)
{
switch (i)
{
case 1: printf("\n请输入数学成绩:"); break;
case 2: printf("\n请输入英语成绩:"); break;
case 3: printf("\n请输入c语言成绩:"); break;
}
scanf("%f", &p -> score[i - 1]);
while (p ->score[i - 1] < 0 || p -> score[i - 1] > 100)
{
printf("\n错误的输入,请重新输入:");
scanf("%f", &p -> score[i - 1]);
}
}
for (i = 1; i <= 3; i++)
s += p -> score[i];
p -> sum = s;
p -> ave = s / 3;
}
p = p -> next;
}
return head;
}
StuInfo *order_sort(StuInfo *head)
{
StuInfo *p, *q, *r, *s;
StuInfo first, tail;
int select;
if (head == NULL)
{
printf("这是个空表，没有任何学生信息!\n");
return NULL;
}
printf("\n升序输入1\t降序输入2.\n请输入:");
scanf("%d", &select);
if (select == 1)
{
first.next = head;
p = &first;
while (p -> next != NULL)
{
p = p -> next;
}
p -> next = &tail;
p = &tail;
while (p != first.next)
{
q = &first;
r = q -> next;
s = r -> next;
while (s != p)
{
if ((r -> order) > (s -> order))
{
r -> next = s -> next;
s -> next = r;
q -> next = s;
q = s;
s = r -> next;
}
else
{
q = r;
r = s;
s = s -> next;
}
}
p = r;
}
while (p -> next != &tail)
p = p -> next;
p -> next = NULL;
}
if (select == 2)
{
first.next = head;
p = &first;
while (p -> next != NULL)
{
p = p -> next;
}
p -> next = &tail;
p = &tail;
while (p != first.next)
{
q = &first;
r = q -> next;
s = r -> next;
while (s != p)
{
if ((r -> order) < (s -> order))
{
r -> next = s -> next;
s -> next = r;
q -> next = s;
q = s;
s = r -> next;
}
else
{
q = r;
r = s;
s = s -> next;
}
}
p = r;
}
while (p -> next != &tail)
p = p -> next;
p -> next = NULL;
}
return first.next;
}
void quit(void)
{
exit(0);
}[ 本帖最后由 有容就大 于 2012-3-5 20:48 编辑 ]
别人也是好多头文件啊？