昨天的作业增加增删改查功能
代码:
/*******************************************/
文件名:Xs.c
功能:函数内容
/*******************************************/
#include "Xs.h"
int list_empty(struct Class *class_1)
{
return class_1->size == 0;
}
int list_full(struct Class *class_1)
{
return class_1->size == MAX;
}
void print_menu()
{
printf("\t\t======1、录入学生信息======\n");
printf("\t\t======2、查看学生信息======\n");
printf("\t\t======3、查看最高分和最低分的学生信息======\n");
printf("\t\t======4、查看学生的总成绩和平均成绩======\n");
printf("\t\t======5、按成绩排序,根据升降序确定排序功能======\n");
printf("\t\t======6、查找学生姓名,确定是否存在======\n");
printf("\t\t======7、查找学生学号,确定是否存在======\n");
printf("\t\t======8、查找学生成绩,确定是否存在======\n");
printf("\t\t======9、增加学生信息======\n");
printf("\t\t======10、删除学生信息======\n");
printf("\t\t======11、修改学生信息======\n");
printf("\t\t======12、按学号排序======\n");
printf("\t\t======0、退出======\n");
}
void shuru(struct Class *class_1)
{
for (int i = 0; i < class_1->size; i++)
{
printf("请输入第%d个学生的姓名:", i + 1);
scanf("%s", class_1->student[i].name);
printf("请输入第%d个学生的性别:", i + 1);
scanf("%s", class_1->student[i].gender);
printf("请输入第%d个学生的年龄:", i + 1);
scanf("%d", &class_1->student[i].age);
printf("请输入第%d个学生的成绩:", i + 1);
scanf("%f", &class_1->student[i].score);
class_1->student[i].num_id = i + 1;
}
}
//查看函数
void see(struct Class *class_1)
{
printf("学号\t姓名\t性别\t年龄\t成绩\n");
for (int i = 0; i < class_1->size; i++)
{
printf("%d\t%s\t%s\t%d\t%.2f\n", class_1->student[i].num_id, class_1->student[i].name, class_1->student[i].gender, class_1->student[i].age, class_1->student[i].score);
}
}
//最高分最低分函数
void max_min(struct Class *class_1)
{
struct Stu max; //存储最高分信息
struct Stu min; //存储最低分信息
int max_value = 0;
int min_value = 100;
for (int i = 0; i < class_1->size; i++)
{
if (class_1->student[i].score > max_value)
{
max_value = class_1->student[i].score; //分数传递后继续参与比较
max = class_1->student[i];
}
}
for (int i = 0; i < class_1->size; i++)
{
if (class_1->student[i].score < min_value)
{
min_value = class_1->student[i].score;
min = class_1->student[i];
}
}
printf("最高分的学生是%d号的%s,成绩为%.2f\n", max.num_id, max.name, max.score);
printf("最低分的学生是%d号的%s,成绩为%.2f\n", min.num_id, min.name, min.score);
}
//总分平均分函数
void total_ave(struct Class *class_1)
{
float total = 0;
float ave = 0;
for (int i = 0; i < class_1->size; i++)
{
total = total + class_1->student[i].score;
}
ave = (float)total / class_1->size;
printf("总成绩为%.2f,平均分为%.2f\n", total, ave);
}
//排序函数
void sort(struct Class *class_1, int way)
{
struct Stu temp; //存储过度值
switch (way) //判断升序或降序
{
case 1:
{
for (int i = 1; i < class_1->size; i++)
{
for (int j = 0; j < class_1->size - i; j++)
{
if (class_1->student[j].score > class_1->student[j + 1].score)
{
temp = class_1->student[j];
class_1->student[j] = class_1->student[j + 1];
class_1->student[j + 1] = temp;
}
}
}
}
break;
case 0:
{
for (int i = 1; i < class_1->size; i++)
{
for (int j = 0; j < class_1->size - i; j++)
{
if (class_1->student[j].score < class_1->student[j + 1].score)
{
temp = class_1->student[j];
class_1->student[j] = class_1->student[j + 1];
class_1->student[j + 1] = temp;
}
}
}
}
break;
default:
printf("error\n");
}
}
//查看函数
void seek_name(struct Class *class_1)
{
int num_in = 0;
char seek_name[20] = {""};
printf("请输入想要查找的学生的姓名:");
scanf("%s", &seek_name);
for (int i = 0; i < class_1->size; i++)
{
if (strcmp(class_1->student[i].name, seek_name) == 0) //判断字符是否相等
{
printf("这位学生是第%d号,性别为%s,年龄为%d,成绩为%.2f\n", class_1->student[i].num_id, class_1->student[i].gender, class_1->student[i].age, class_1->student[i].score);
num_in = 1; //表示已经找到学生
}
}
if (num_in == 0) //判断未找到学生
{
printf("该学生不存在于该班级\n");
}
}
void seek_id(struct Class *class_1)
{
int num_in = 0;
int seek_id = 0;
printf("请输入想要查找的学生的学号:");
scanf("%d", &seek_id);
for (int i = 0; i < class_1->size; i++)
{
if (class_1->student[i].num_id == seek_id) //判断字符是否相等
{
printf("这位学生是%s,性别为%s,年龄为%d,成绩为%.2f\n", class_1->student[i].name, class_1->student[i].gender, class_1->student[i].age, class_1->student[i].score);
num_in = 1; //表示已经找到学生
}
}
if (num_in == 0) //判断未找到学生
{
printf("该学生不存在于该班级\n");
}
}
void seek_score(struct Class *class_1)
{
int num_in = 0;
float seek_score = 0;
printf("请输入想要查找的学生的成绩:");
scanf("%f", &seek_score);
for (int i = 0; i < class_1->size; i++)
{
if (class_1->student[i].score == seek_score) //判断字符是否相等
{
printf("这位学生是第%d号的%s,性别为%s,年龄为%d\n", class_1->student[i].num_id, class_1->student[i].name, class_1->student[i].gender, class_1->student[i].age);
num_in = 1; //表示已经找到学生
}
}
if (num_in == 0) //判断未找到学生
{
printf("该学生不存在于该班级\n");
}
}
void increase(struct Class *class_1)
{
int join = 0;
printf("请输入你想在哪个序号位加入学生:");
scanf("%d", &join);
int join_num = 0;
printf("你想在此处加入学生数为:");
scanf("%d", &join_num);
class_1->size = class_1->size + join_num;
if (NULL == class_1 || list_full(class_1) || join < 0 || join + join_num - 1 > class_1->size)
{
printf("插入失败\n");
return;
}
for (int i = class_1->size - join_num; i >= join - 1; i--)
{
class_1->student[i + join_num] = class_1->student[i];
class_1->student[i + join_num].num_id = i + join_num + 1;
}
for (int i = join - 1; i < join + join_num - 1; i++)
{
printf("请输入第%d个学生的姓名:", i + 1);
scanf("%s", class_1->student[i].name);
printf("请输入第%d个学生的性别:", i + 1);
scanf("%s", class_1->student[i].gender);
printf("请输入第%d个学生的年龄:", i + 1);
scanf("%d", &class_1->student[i].age);
printf("请输入第%d个学生的成绩:", i + 1);
scanf("%f", &class_1->student[i].score);
class_1->student[i].num_id = i + 1;
}
}
void omit(struct Class *class_1)
{
int out = 0;
printf("请输入你想在哪个序号位删除学生:");
scanf("%d", &out);
int out_num = 0;
printf("你想在此处删除学生数为:");
scanf("%d", &out_num);
class_1->size = class_1->size - out_num;
if (NULL == class_1 || list_empty(class_1) || out < 0 || out + out_num >= class_1->size)
{
printf("插入失败\n");
return;
}
for (int i = out - 1; i <= class_1->size - out_num; i++)
{
class_1->student[i] = class_1->student[i + out_num];
class_1->student[i].num_id = i + 1;
}
}
void chan(struct Class *class_1)
{
struct Class *class_temp = (struct Class *)malloc(10000);
int cha = 0;
printf("请输入你想在哪个序号位修改学生:");
scanf("%d", &cha);
int cha_num = 0;
printf("你想在此处修改学生数为:");
scanf("%d", &cha_num);
if (NULL == class_1 || list_empty(class_1) || cha <= 0 || cha + cha_num >= class_1->size)
{
printf("插入失败\n");
return;
}
for (int i = cha - 1; i < cha + cha_num - 1; i++)
{
printf("请输入第%d个学生的姓名:", i + 1);
scanf("%s", class_temp->student[i].name);
printf("请输入第%d个学生的性别:", i + 1);
scanf("%s", class_temp->student[i].gender);
printf("请输入第%d个学生的年龄:", i + 1);
scanf("%d", &class_temp->student[i].age);
printf("请输入第%d个学生的成绩:", i + 1);
scanf("%f", &class_temp->student[i].score);
class_temp->student[i].num_id = i + 1;
}
for (int i = cha - 1; i < cha + cha_num - 1; i++)
{
class_1->student[i] = class_temp->student[i];
}
}
void back(struct Class *class_1)
{
struct Stu temp; //存储过度值
for (int i = 1; i < class_1->size; i++)
{
for (int j = 0; j < class_1->size - i; j++)
{
if (class_1->student[j].num_id > class_1->student[j + 1].num_id)
{
temp = class_1->student[j];
class_1->student[j] = class_1->student[j + 1];
class_1->student[j + 1] = temp;
}
}
}
}
/*******************************************/
文件名:main.c
功能:运行主程序
/*******************************************/
#include "Xs.h"
//主函数
int main(int argc, char const *argv[])
{
struct Class *class_1 = (struct Class *)malloc(100000); //存储学生信息
memset(class_1, 0, sizeof(class_1));
printf("请输入这个班级的实际人数:");
scanf("%d", &class_1->size);
while (1)
{
int choose = 0;
print_menu(); //调用菜单
printf("请输入你想要进行的操作编号:");
scanf("%d", &choose);
switch (choose) //判断操作
{
case 1:
{
shuru(class_1); //调用输入函数
}
break;
case 2:
{
see(class_1); //调用查看函数
}
break;
case 3:
{
max_min(class_1); //调用最高分最低分函数
}
break;
case 4:
{
total_ave(class_1); //调用总分平均分函数
}
break;
case 5:
{
int choosen = 0;
printf("需要升序还是降序(输入1或0):");
scanf("%d", &choosen);
sort(class_1, choosen); //调用排序函数
}
break;
case 6:
{
seek_name(class_1); //调用查找函数
}
break;
case 7:
{
seek_id(class_1);
}
break;
case 8:
{
seek_score(class_1);
}
break;
case 9:
{
increase(class_1);
}
break;
case 10:
{
omit(class_1);
}
break;
case 11:
{
chan(class_1);
}
break;
case 12:
{
back(class_1);
}
break;
case 0:
return 0;
default:
printf("error\n");
}
}
free(class_1);
return 0;
}
/*******************************************/
文件名:Xs.h
功能:声明函数和结构体
/*******************************************/
#ifndef XS_H
#define XS_H
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAX 100
struct Stu
{
int num_id;
char name[20];
char gender[20];
int age;
float score;
};
struct Class
{
struct Stu student[MAX];
int size;
};
void print_menu();
int list_empty(struct Class *class_1);
int list_full(struct Class *class_1);
void shuru(struct Class *class_1);
void see(struct Class *class_1);
void max_min(struct Class *class_1);
void total_ave(struct Class *class_1);
void sort(struct Class *class_1, int way);
void seek_name(struct Class *class_1);
void seek_id(struct Class *class_1);
void seek_score(struct Class *class_1);
void increase(struct Class *class_1);
void omit(struct Class *class_1);
void chan(struct Class *class_1);
void back(struct Class *class_1);
#endif