学生成绩管理系统（大一大作业）

功能

实现添加，排序，修改，保存等功能

库函数

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

头文件

#define functioncreate(major) void major##compare(mana mn){\
	int i,j,sum=mn->sum;\
	for(i=0;i<sum-1;i++)\
	for(j=0;j<sum-i-1;j++)\
	if(mn->student[j].grade->major<mn->student[j+1].grade->major)\
	swap(&mn->student[j],&mn->student[j+1]);\
}
typedef struct a1 {	//学生成绩信息
	int Chinese;
	int Math;
	int English;
	int Physics;
	int Chemistry;
	int Organism;
	int All;
}*grade;
typedef struct a2 {	//学生信息
	char name[10];
	int stunum;
	grade grade;
	int namelong;
}*student;
typedef struct a3{	//全体学生信息
	int sum;
	student student;
	int capacity;
}*mana;
void setpos(short x, short y);	//设置位置
void init();	//初始化
void welcome();	//欢迎界面
void start();	//开始
void menu();	//菜单
void addstu(mana mn);//加入
void initmana(mana mn);// 初始化
void exportcapacity(mana mn);//扩容
void modifystu(mana mn);//修改个人
void showsin(student stu,int i);//展示单人
void showall(mana mn);//展示全部
void clean(mana mn);//清空
void swap(student p1, student p2);//交换
void compare(mana mn);//比较
void initstu(student mn);//初始化学生信息
void stunumcompare(mana mn);//学号排序
void save(mana mn);//保存
void read(mana mn);//读取
void cpy(char*a1,char*a2);//复制字符串

函数实现

void setpos(short x, short y) {
	HANDLE mn = GetStdHandle(STD_OUTPUT_HANDLE);
	COORD pos = { x,y };
	SetConsoleCursorPosition(mn, pos);
}
void init() {
	HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
	//影藏光标操作
	CONSOLE_CURSOR_INFO CursorInfo;
	GetConsoleCursorInfo(hOutput, &CursorInfo);//获取控制台光标信息
	CursorInfo.bVisible = false; //隐藏控制台光标
	SetConsoleCursorInfo(hOutput, &CursorInfo);//设置控制台光标状态
}
void welcome() {
	init();
	system("title 学生成绩管理系统");
	system("mode con cols=100 lines=30");
	setpos(35,10);
	printf("欢迎来到学生成绩管理系统");
	setpos(40, 17);
	system("pause");
}
void menu() {
	system("cls");
	setpos(30, 5);
	printf("请点击相应按键决定您的下一步操作");
	setpos(30,10);
	printf("1.添加新学生-------2.清空");
	setpos(30, 12);
	printf("3.排序---------------4.无");
	setpos(30, 14);
	printf("5.修改学生信息-----6.查看学生成绩");
	setpos(30, 16);
	printf("------------0.退出-----------");
	setpos(38, 20);
}
void initmana(mana mn) {
	mn->capacity = 0;
	mn->student = NULL;
	mn->sum = 0;
}
void exportcapacity(mana mn) {
	if (mn->capacity > mn->sum)
		return;
	int capacity = mn->capacity == 0 ? 1 : 2 * mn->capacity;
	mn->capacity = capacity;
	mn->student = (student)realloc(mn->student, sizeof(struct a2) * capacity);
}
void initstu(student mn) {
	student now = mn;
	int sum = 0;
	setpos(30, 10);
	printf("请输入新学生的姓名(拼音):");
	scanf("%s", now->name);
	now->namelong = strlen(now->name);
	system("cls");
	setpos(35, 10);
	printf("请输入新学生的学号:");
	scanf("%d", &(now->stunum));
	system("cls");
	setpos(35, 10);
	printf("请输入语文成绩:");
	scanf("%d", &(now->grade->Chinese));
	sum += now->grade->Chinese;
	system("cls");
	setpos(35, 10);
	printf("请输入数学成绩:");
	scanf("%d", &(now->grade->Math));
	sum += now->grade->Math;
	system("cls");
	setpos(35, 10);
	printf("请输入英语成绩:");
	scanf("%d", &(now->grade->English));
	sum += now->grade->English;
	system("cls");
	setpos(35, 10);
	printf("请输入物理成绩:");
	scanf("%d", &(now->grade->Physics));
	sum += now->grade->Physics;
	system("cls");
	setpos(35, 10);
	printf("请输入化学成绩:");
	scanf("%d", &(now->grade->Chemistry));
	sum += now->grade->Chemistry;
	system("cls");
	setpos(35, 10);
	printf("请输入生物成绩:");
	scanf("%d", &(now->grade->Organism));
	sum += now->grade->Organism;
	now->grade->All = sum;
	system("cls");
}
void stunumcompare(mana mn)
{
	int i, j, sum = mn->sum;
	for (i = 0; i < sum - 1; i++) {
		for (j = 0; j < sum - i - 1; j++) {
			if (mn->student[j].stunum < mn->student[j + 1].stunum)
				swap(&mn->student[j], &mn->student[j + 1]);
		}
	}
}
void addstu(mana mn) {
	system("cls");
	exportcapacity(mn);
	mn->student[mn->sum].grade = (grade)malloc(sizeof(struct a1));
	initstu(&mn->student[mn->sum]);
	mn->sum++;
	setpos(40, 10);
	printf("加入完成");
	setpos(40, 12);
	system("pause");
	system("cls");
}

void modifystu(mana mn) {
	system("cls");
	setpos(30, 10);
	printf("请输入你要修改的学生名字(拼音):");
	char s[10];
	scanf("%s", s);
	int i;
	for (i = 0; i < mn->sum; i++) {
		if (strcmp(s, mn->student[i].name)==0)
		break;
	}
	system("cls");
	if (i == mn->sum) {
		setpos(30, 10);
		printf("查无此人");
		return;
	}
	student now = &(mn->student[i]);
	initstu(now);
}
void showsin(student stu,int i) {//姓名，学号，语数英物化生顺序
	setpos(25, 5 + 2 * i);
	printf("%s", stu->name);
	setpos(30, 5 + 2 * i);
	printf("%d", stu->stunum);
	setpos(35, 5 + 2 * i);
	printf("%d", stu->grade->Chinese);
	setpos(40, 5 + 2 * i);
	printf("%d", stu->grade->Math);
	setpos(45, 5 + 2 * i);
	printf("%d", stu->grade->English);
	setpos(50, 5 + 2 * i);
	printf("%d", stu->grade->Physics);
	setpos(55, 5 + 2 * i);
	printf("%d", stu->grade->Chemistry);
	setpos(60, 5 + 2 * i);
	printf("%d", stu->grade->Organism);
	setpos(65, 5 + 2 * i);
	printf("%d", stu->grade->All);
}
void showall(mana mn) {
	int i = 0, sum = mn->sum;
	if (sum == 0) {
		setpos(45, 13);
		printf("暂空");
	}
	system("cls");
	setpos(25,3);
	printf("姓名");
	setpos(30, 3);
	printf("学号");
	setpos(35, 3);
	printf("语文");
	setpos(40, 3);
	printf("数学");
	setpos(45, 3);
	printf("英语");
	setpos(50, 3);
	printf("物理");
	setpos(55, 3);
	printf("化学");
	setpos(60, 3);
	printf("生物");
	setpos(65, 3);
	printf("总分");
	for (i = 0; i < sum; i++)
		showsin(&mn->student[i], i);
	setpos(50, 25);
	system("pause");
	system("cls");
}
void clean(mana mn) {
	system("cls");
	free(mn->student);
	mn->student = NULL;
	mn->capacity = mn->sum = 0;
	setpos(40, 14);
	printf("清空成功");
	system("pause");
}
void swap(student p1, student p2) {
	struct a2 mn = *p1;
	*p1 = *p2;
	*p2 = mn;
}
functioncreate(Math)
functioncreate(Chinese)
functioncreate(English)
functioncreate(Physics)
functioncreate(Chemistry)
functioncreate(Organism)
functioncreate(All)
void compare(mana mn) {
	system("cls");
	setpos(37, 10);
	printf("请选择您的排序方式");
	setpos(35, 12);
	printf("1.语文");
	setpos(45, 12);
	printf("2.数学");
	setpos(35, 14);
	printf("3.英语");
	setpos(45, 14);
	printf("4.物理");
	setpos(35, 16);
	printf("5.化学");
	setpos(45, 16);
	printf("6.生物");
	setpos(35, 18);
	printf("7.学号");
	setpos(45, 18);
	printf("8.总分");
	setpos(40, 20);
	int a;
	scanf("%d", &a);
	switch (a) {
	case 1:Chinesecompare(mn); break;
	case 2:Mathcompare(mn); break;
	case 3:Englishcompare(mn); break;
	case 4:Physicscompare(mn); break;
	case 5:Chemistrycompare(mn); break;
	case 6:Organismcompare(mn); break;
	case 7:stunumcompare(mn); break;
	case 8:Allcompare(mn); break;
	}
	system("cls");
	setpos(40, 14);
	printf("排序完成，请自行查看");
	setpos(40, 15);
	system("pause");
}
void start() {
	welcome();
	mana mn = (mana)malloc(sizeof(struct a3));
	initmana(mn);
	read(mn);
	int choose;
	do {
		menu();
		scanf("%d", &choose);
		switch (choose) {
		case 1:addstu(mn); break;
		case 2:clean(mn); break;
		case 3:compare(mn); break;
		case 5:modifystu(mn); break;
		case 6:showall(mn); break;
		case 0:break;
		}
	} while (choose);
	save(mn);
}
void save(mana mn) {
	FILE* file = fopen("save.txt", "wb");
	int i;
	for (i = 0; i < mn->sum; i++) {//先存名字长度，再存学号，再存名字,最后存成绩
		fwrite(&((mn->student + i)->namelong), sizeof(int), 1, file);
		fwrite(&((mn->student+i)->stunum), sizeof(int), 1, file);
		fwrite((mn->student + i)->name, (mn->student + i)->namelong, 1, file);
		fwrite((mn->student+i)->grade, sizeof(struct a1), 1, file);
	}
	fclose(file);
}
void cpy(char* a1, char* a2,int sum) {
	while (sum--) {
		*a1 = *a2;
		a1++;
		a2++;
	}
}
void read(mana mn) {
	FILE* file = fopen("save.txt", "rb");
	int i;
	char arr[10];
	while (fread(&i, sizeof(int), 1, file)) {
		exportcapacity(mn);
		mn->student[mn->sum].namelong = i;
		mn->student[mn->sum].grade = (grade)malloc(sizeof(struct a1));
		fread(&i, sizeof(int), 1, file);
		mn->student[mn->sum].stunum = i;
		fread(arr, sizeof(char) * (mn->student[mn->sum].namelong), 1, file);
		cpy(mn->student[mn->sum].name, arr, mn->student[mn->sum].namelong);
		mn->student[mn->sum].name[mn->student->namelong] = '\0';
		fread(mn->student[mn->sum].grade, sizeof(struct a1), 1, file);
		mn->sum++;
	}
	fclose(file);
}