成绩管理.c

c语言学生成绩管理系统 c语言学生成绩管理系统

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 20
struct subject
{
	int num;
	char sname[20];
	int score;
};
typedef struct node
{
	int id;
	char name[20];
	char add[20];
	char n;
	struct subject subj[N];
	struct node *next;
}linklist;
typedef struct indexs
{
	int id;
	int address;
	struct indexs *next;
}index1;
linklist *head;
FILE *fp;
char filename[10];
FILE *fp2;
char filename2[20];

void main()
{
 int x;
 linklist *creat();
 void search();
 void index();
 void edit();
 void count();
 void beifen();
 void print2();
 void print1();
 system("cls");
 printf("**********************学生管理系统****************************\n");
 printf(" 1：输入学生信息\n");
 printf(" 2：查找学生信息\n");
 printf(" 3：学生信息索引\n");
 printf(" 4：学生信息编辑\n");
 printf(" 5：学生成绩统计\n");
 printf(" 6：备份\n");
 printf(" 7：退出\n");
 printf(" 请输入你要操作的步骤：\n");
 scanf("%d",&x);
 getchar();
 switch(x)
	{
     case 1:{
		       creat();
			   print2();
			   printf("\n按回车键返回主菜单：");
			   getchar();
			   main();
			}
	        break;
     case 2:{
		      search();
		   	  main();
			}
	         break;
     case 3:{
		      index();
			  print1();
			  printf("\n按回车键返回主菜单：");
			  getchar();
			  main();
			}
	        break;
     case 4:{
		       edit();
			   main();
			}
	        break;
	 case 5:{
		       count();
			   main();
			}
	        break;
     case 6:{
		       beifen();
			   printf("\n按回车键返回主菜单：");
			   getchar();
			   main();
			}
	        break;
	 case 7:break;
     default:printf("输入错误！请重试");
	}
}

linklist *creat()
{
	int id;
	int i;
	linklist *r,*s;
	linklist *subj;
	printf("请输入文件名：");
	gets(filename);
	if((fp=fopen(filename,"w+"))==NULL)
	{
		printf("error!\n");
		exit(0);
	}
	head=(linklist *)malloc(sizeof(linklist));
	subj=(linklist *)malloc(sizeof(linklist));
	r=head;
	printf("输入学号：");
	scanf("%d",&id);
	getchar();
	while (id!=0)
	{
		s=(linklist *)malloc(sizeof(linklist));
		s->id=id;
		printf("输入姓名：");
		gets(s->name);
		printf("输入学院：");
		gets(s->add);
		printf("输入该学生的课程数：");
		scanf("%d",&s->n);
		getchar();
		fprintf(fp,"%d %s %s %d\n",id,s->name,s->add,s->n);
		for(i=0;i<s->n;i++)
		{		
			printf("课程号:");
			scanf("%d",&s->subj[i].num);
			getchar();
			printf("课程名:");
			gets(s->subj[i].sname);
			printf("成绩:");
			scanf("%d",&s->subj[i].score);
			fprintf(fp,"%d %s %d\n",s->subj[i].num,s->subj[i].sname,s->subj[i].score);
		}
    	r->next=s;
		r=s;
	    printf("输入学生学号：");
		scanf("%d",&id);
		getchar();
	}
	r->next=NULL;
	fclose(fp); 
	return head;
}
void print2() 
{
	int i;
	linklist *p,*subj;
	system("cls");
	printf("操作后文件中学生信息是：\n");
	printf("请输入文件名：");
	gets(filename);
	if((fp=fopen(filename,"r"))==NULL)
		printf("打开文件错误！\n");
	p=(linklist *)malloc(sizeof(linklist));
	subj=(linklist *)malloc(sizeof(linklist));
	while(feof(fp)==0)
	{
		fscanf(fp,"%d%s%s%d",&p->id,p->name,p->add,&p->n);
		printf("学号：%d\n",p->id);
    	printf("姓名：%s\n",p->name);
    	printf("学院：%s\n",p->add);
		printf("课程数：%d\n",p->n);
		printf("   课程号    课程名    成绩\n");
		for(i=0;i<p->n;i++)
		{
			fscanf(fp,"%d%s%d\n",&p->subj[i].num,p->subj[i].sname,&p->subj[i].score);
			printf("   %d         %s         %d\n",p->subj[i].num,p->subj[i].sname,p->subj[i].score);
		}
	}
	fclose(fp);
}

void search()
{
	int x;
	void search_id();
	void search_add();
	void search_compose();
	system("cls");
	printf("*********************Search Menu***********************\n");
	printf(" 1:按学号查找\n");
	printf(" 2:按学院查找\n");
	printf(" 3:组合查找\n");
	printf(" 4:退出\n");
	printf("输入您要进行的步骤:");
	scanf("%d",&x);
	getchar();
	switch(x)
	{
	case 1:{
		      search_id();
		      printf("\n按回车键返回主菜单：");
			  getchar();
		   }
		   break;
    case 2:{
	       	  search_add();
			  printf("\n按回车键返回主菜单：");
			  getchar();
		   }
		   break;
    case 3:{
	    	  search_compose();
			  printf("\n按回车键返回主菜单：");
			  getchar();
		   }
		   break;
    case 4:
		   break;
	}
}

void search_id()
{
	int id,i;
	linklist *p,*subj;
	printf("请输入文件名：");
	gets(filename);
	if((fp=fopen(filename,"r"))==NULL)
		printf("打开文件错误！\n");
	printf("输入你要查找学生的学号:");
	scanf("%d",&id);
	getchar();
	p=(linklist *)malloc(sizeof(linklist));
	subj=(linklist *)malloc(sizeof(linklist));
	while(feof(fp)==0)
	{
    	fscanf(fp,"%d%s%s%d",&p->id,p->name,p->add,&p->n);
		for(i=0;i<p->n;i++)
			fscanf(fp,"%d%s%d\n",&p->subj[i].num,p->subj[i].sname,&p->subj[i].score);
		if(p->id==id)
		{
			printf("你要查找信息是:\n");
			printf("学号：%d\n",p->id);
			printf("姓名：%s\n",p->name);
			printf("学院：%s\n",p->add);
			printf("课程数：%d\n",p->n);
			printf("  课程号   课程名    成绩\n");
			for(i=0;i<p->n;i++)
				printf("  %d        %s        %d\n",p->subj[i].num,p->subj[i].sname,p->subj[i].score);
			break;
		}
	}
	fclose(fp);
}

void search_add()
{
	char add[20];
	int i;
	linklist *p,*subj;
	printf("请输入文件名：");
	gets(filename);
	if((fp=fopen(filename,"r"))==NULL)
		printf("打开文件错误！\n");
	printf("输入你要查找学生的学院：");
	gets(add);
	p=(linklist *)malloc(sizeof(linklist));
	subj=(linklist *)malloc(sizeof(linklist));
    printf("您要查找的学生信息是：\n");
	while(feof(fp)==0)
	{
    	fscanf(fp,"%d%s%s%d",&p->id,p->name,p->add,&p->n);
		for(i=0;i<p->n;i++)
			fscanf(fp,"%d%s%d\n",&p->subj[i].num,p->subj[i].sname,&p->subj[i].score);
		if(strcmp(p->add,add)==0)
		{
        	printf("姓名：%s\n",p->name);
		}
	}
	fclose(fp);
}

void search_compose()
{
	char add[20];
	char name[20];
	int i;
	int num;
	linklist *p,*subj;
	printf("请输入文件名：");
	gets(filename);
	if((fp=fopen(filename,"r"))==NULL)
		printf("打开文件错误！\n");
	printf("请输入你要查找的学生姓名：");
	gets(name);
	printf("请输入你要查找的学生学院：");
	gets(add);
	printf("请输入你要查找的学生课程号：");
	scanf("%d",&num);
	getchar();
	subj=(linklist *)malloc(sizeof(linklist));
	printf("你要查找的学生信息为：");
	while(feof(fp)==0)
	{
		p=(linklist *)malloc(sizeof(linklist));
		fscanf(fp,"%d%s%s%d",&p->id,p->name,p->add,&p->n);
		for(i=0;i<p->n;i++)
			fscanf(fp,"%d%s%d\n",&p->subj[i].num,p->subj[i].sname,&p->subj[i].score);
		if(strcmp(p->name,name)==0)
			if(strcmp(p->add,add)==0)
		    	for(i=0;i<p->n;i++)
				{
			    	if(p->subj[i].num==num)
					{
		            	printf("你要查找信息是:\n");
	   	            	printf("学号：%d\n",p->id);
	           	    	printf("姓名：%s\n",p->name);
	                 	printf("学院：%s\n",p->add);
                    	printf("课程数：%d\n",p->n);
                    	printf("  课程号   课程名    成绩\n");
	                	for(i=0;i<p->n;i++)
						{
		       	        	printf("  %d        %s        %d\n",p->subj[i].num,p->subj[i].sname,p->subj[i].score);
						}
					}
					break;
				}
	}
	fclose(fp);
}


index1 *selesort(index1 *h)
{
	index1 *p,*q,*r,*min;
	q=h;
	min=h->next;
	while(q->next!=NULL)
	{
		r=min;
		p=min->next;
		while(p!=NULL)
		{
			if(p->id<min->id)
			{
				r->next=p->next;
				p->next=min;
				q->next=p;
				min=p;
				p=r->next;
			}
			else 
				if(p->id==min->id)
				{
			    	r->next=p->next;
			    	p->next=min->next;
			    	min->next=p;
			    	p=r->next;
		    		q=min;
			    	min=min->next;
				}
		    	else
				{
			    	r=p;
			    	p=p->next;
				}
		}
	    q=min;
		min=min->next;
	}
	return h;
}


void index()
{
	int i;
	linklist *subj,*r,*p;
	index1 *p1,*r1,*h;
	index1 *selesort(index1 *h);
	system("cls");
	subj=(linklist *)malloc(sizeof(linklist));
	head=(linklist *)malloc(sizeof(linklist));
	h=(index1 *)malloc(sizeof(index1));
	printf("请输入文件名：");
	gets(filename);
	if((fp=fopen(filename,"r"))==NULL)
	{
		printf("打开文件错误！\n");
		exit(0);
	}
	printf("请输入索引文件名：");
	gets(filename2);
	if((fp2=fopen(filename2,"w+"))==NULL)
	{
		printf("打开文件错误！\n");
		exit(0);
	}
	r=head;
	r1=h;
	fseek(fp,0,0);
	while(feof(fp)==0)
	{
		p=(linklist *)malloc(sizeof(linklist));
		p1=(index1 *)malloc(sizeof(index1));
		fscanf(fp,"%d%s%s%d",&p->id,p->name,p->add,&p->n);
		p1->address=ftell(fp);
		p1->id=p->id;
		for(i=0;i<p->n;i++)
			fscanf(fp,"%d%s%d\n",&p->subj[i].num,p->subj[i].sname,&p->subj[i].score);
		r->next=p;
		r=p;
		r1->next=p1;
		r1=p1;
	}
	r->next=NULL;
	r1->next=NULL;
	fclose(fp);
	selesort(h);
	p1=h->next;
	while(p1)
	{
		fprintf(fp2,"%d %d\n",p1->id,p1->address);
		p1=p1->next;
    }
	fclose(fp2);
}

void print1()
{
	int i;
	index1 *p;
	linklist *q,*subj;
	subj=(linklist *)malloc(sizeof(linklist));
	printf("请输入文件名：");
	gets(filename);
	if((fp=fopen(filename,"r"))==NULL)
	{
		printf("打开文件失败！");
		exit(0);
	}
	printf("请输入索引文件名：");
	gets(filename2);
	if((fp2=fopen(filename2,"r"))==NULL)
	{
		printf("打开文件2失败！");
		exit(0);
	}
	while(feof(fp2)==0)
	{
		p=(index1 *)malloc(sizeof(index1));
	   	q=(linklist *)malloc(sizeof(linklist));
		fscanf(fp2,"%d%d\n",&p->id,&p->address);
	   	fseek(fp,p->address-sizeof(linklist),0);
	   	fscanf(fp,"%d%s%s%d",&q->id,q->name,q->add,&q->n);
    	printf("学号：%d\n",q->id);
       	printf("姓名：%s\n",q->name);
       	printf("学院：%s\n",q->add);
	   	printf("课程数：%d\n",q->n);
	   	printf("   课程号    课程名    成绩\n");
    	for(i=0;i<q->n;i++)
		{
	    	fscanf(fp,"%d%s%d\n",&q->subj[i].num,q->subj[i].sname,&q->subj[i].score);
	    	printf("   %d         %s         %d\n",q->subj[i].num,q->subj[i].sname,q->subj[i].score);
		}
	}
	fclose(fp2);
	fclose(fp);
}

void edit()
{
	int x;
	void insert();
	void delet_id();
	void delet_name();
    void modify_id();
	void modify_name();
	void print2();
	system("cls");
	printf("***********************欢迎使用编辑子系统****************************\n");
	printf(" 1：插入一个学生信息\n");
	printf(" 2：按学号删除学生\n");
	printf(" 3：按姓名删除学生\n");
	printf(" 4：按学号修改学生信息\n");
	printf(" 5：按姓名修改学生信息\n");
	printf(" 6：退出\n");
	printf(" 请输入你要操作的步骤：\n");
	scanf("%d",&x);
	getchar();
	switch (x)
	{
	case 1:{
	    	insert();
		    print2();
	    	printf("\n按回车键返回主菜单：");
		    getchar();
		   }
	       break;
	case 2:{
	       	delet_id();
		    print2();
		    printf("\n按回车键返回主菜单：");
		    getchar();
		   }
	       break;
	case 3:{
		    delet_name();
	        print2();
		    printf("\n按回车键返回主菜单：");
		    getchar();
		   }
	       break;
	case 4:{
	    	modify_id();
		    print2();
			printf("\n按回车键返回主菜单：");
			getchar();
		   }
	       break;
	case 5:{
	    	modify_name();
		    print2();
			printf("\n按任回车返回主菜单：");
			getchar();
		   }
	       break;
    case 6:
		   break;
	}
}

void insert()
{
	int num,i;
	linklist *p,*q,*r,*s;
	linklist *subj;
	int in_id,in_n,in_num,in_score;
	char in_name[20],in_add[20],in_sname[20];
	q=(linklist *)malloc(sizeof(linklist));
	head=(linklist *)malloc(sizeof(linklist));
	s=(linklist *)malloc(sizeof(linklist));
	subj=(linklist *)malloc(sizeof(linklist));
	system("cls");
	printf("请输入文件名：");
	gets(filename);
	if((fp=fopen(filename,"r"))==NULL)
	{
		printf("打开文件失败！");
		exit(0);
	}
	printf("请输入你要插入的地点（课程号）：");
	scanf("%d",&num);
	getchar();
	r=head;
	while(feof(fp)==0)
	{
		p=(linklist *)malloc(sizeof(linklist));	
		fscanf(fp,"%d%s%s%d",&p->id,p->name,p->add,&p->n);
		for(i=0;i<p->n;i++)
			fscanf(fp,"%d%s%d\n",&p->subj[i].num,p->subj[i].sname,&p->subj[i].score);
		r->next=p;
		r=p;
	}
	r->next=NULL;
	fclose(fp);
	p=head;
	q=head->next;
	while(q)
	{
		for(i=0;i<q->n;i++)
		{
			if(q->subj[i].num==num)
			{
	        	printf("输入学号：");
				scanf("%d",&in_id);
				getchar();
				if(in_id!=0)