#include<stdio.h> #include<stdlib.h>int N1,N2,kk1,kk2,kk3;struct couse * head1;struct student * head2;struct couse//課程信息結(jié)構(gòu)體 {	int num1;	char name1[20];	int score;	int nelepeo;	//課程已選人數(shù)	int Melepeo;	//課程人數(shù)上限	struct couse * next;};struct student//學(xué)生信息結(jié)構(gòu)體 {	int num2;	char name2[20];	int nelenum[50];	//已選課程編號(hào)	int nelen;	//已選課程數(shù)量	struct student * next;};void Ms() {	for (kk1=0;kk1<1100;kk1++)	        for (kk2=0;kk2<1200;kk2++)	          for (kk3=0;kk3<1200;kk3++);}void keyboardc()//錄入課程子函數(shù)(從鍵盤(pán)錄入) {	struct couse *p1,*p2;	N1=0;	p1=p2=(struct couse*)malloc(sizeof(struct couse));	printf("課程編號(hào)/t課程名稱(chēng)/t學(xué)分/t課程人數(shù)上限/n");	scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);	p1->nelepeo=0;	head1=NULL;	while(p1->num1!=0) 	{		N1=N1+1;		if(N1==1)head1=p1; else p2->next=p1;		p2=p1;		p1=(struct couse * )malloc(sizeof(struct couse));		scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);		p1->nelepeo=0;	}	p2->next=NULL;}void filec()//錄入鍵盤(pán)子函數(shù)(從文件錄入) {	FILE * fp;	char filepath[20];	struct couse *p1,*p2;	N1=0;	printf("輸入要讀入的文件路徑:");	getchar();	gets(filepath);	if((fp=fopen(filepath,"r"))==NULL) 	{		printf("找不到%s文件!/n",filepath);		exit(0);	}	p1=p2=(struct couse*)malloc(sizeof(struct couse));	fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);	head1=NULL;	while(!feof(fp)) 	{		N1=N1+1;		if(N1==1)head1=p1; else p2->next=p1;		p2=p1;		p1=(struct couse * )malloc(sizeof(struct couse));		fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);	}	p2->next=NULL;}void inputc()//錄入課程主函數(shù) {	int i;	printf("/t/t/t錄入課程信息/n");	printf("/n1.從鍵盤(pán)錄入/n");	printf("2.從文件錄入/n");	printf("3.返回主菜單/n");	printf("請(qǐng)選擇(1~3):/n");	scanf("%d",&i);	switch(i) 	{		case(1):keyboardc();		break;		case(2):filec();		break;		case(3):break;	}}void insertc(struct couse *incouse)//課程管理子函數(shù)(增加課程) {	struct couse *p0,*p1,*p2;	p1=head1;	p0=incouse;	if(head1==NULL) 	{		head1=p0;		p0->next=NULL;	} else 	{		while((p0->num1 > p1->num1) && (p1->next!=NULL)) 		{			p2=p1;			p1=p1->next;		}		if(p0->num1 <= p1->num1) 		{			if(head1==p1) head1=p0; else p2->next=p0;			p0->next=p1;		} else 		{			p1->next=p0;			p0->next=NULL;		}	}	N1=N1+1;}void delc(int num1)//課程管理子函數(shù)(刪除課程) {	struct couse *p1,*p2;	if(head1==NULL) 	{		printf("/n沒(méi)有課程,無(wú)法刪除!/n");		goto end;	}	p1=head1;	while(num1!=p1->num1 && p1->next!=NULL) 	{		p2=p1;		p1=p1->next;	}	if(num1==p1->num1) 	{		if(p1==head1) head1=p1->next; else p2->next=p1->next;		printf("已刪除該編號(hào)課程!/n");		N1=N1-1;	} else printf("無(wú)該編號(hào)的課程!/n");	end:;}void managementc()//課程管理主函數(shù) {	struct couse * incouse;	int i,num1;	printf("/t/t/t課程管理/n");	printf("1.新增課程/n");	printf("2.刪除課程/n");	printf("3.返回主菜單/n");	printf("請(qǐng)選擇(1~3):/n");	scanf("%d",&i);	switch(i) 	{		case(1): 		{			incouse=(struct couse *)malloc(sizeof(struct couse));			printf("課程編號(hào)/t課程名稱(chēng)/t學(xué)分/t課程人數(shù)上限/n");			scanf("%d%s%d%d",&incouse->num1,incouse->name1,&incouse->score,&incouse->Melepeo);			incouse->nelepeo=0;			insertc(incouse);			break;		}		case(2): 		{			printf("請(qǐng)輸入要?jiǎng)h除課程的編號(hào):/n");			scanf("%d",&num1);			delc(num1);			break;		}		case(3):break;	}}void keyboards()//錄入學(xué)生信息子函數(shù)（從鍵盤(pán)錄入） {	int i;	struct student *p1,*p2;	N2=0;	p1=p2=(struct student *)malloc(sizeof(struct student));	printf("學(xué)生學(xué)號(hào)/t學(xué)生姓名/n");	scanf("%d%s",&p1->num2,p1->name2);	p1->nelen=0;	for (i=0;i<20;i++) p1->nelenum[i]=0;	head2=NULL;	while(p1->num2!=0) 	{		N2=N2+1;		if(N2==1)head2=p1; else p2->next=p1;		p2=p1;		p1=(struct student * )malloc(sizeof(struct student));		scanf("%d%s",&p1->num2,p1->name2);		p1->nelen=0;		for (i=0;i<20;i++) p1->nelenum[i]=0;	}	p2->next=NULL;}void files()//錄入學(xué)生信息子函數(shù)（從文件錄入） {	int i=0;	FILE * fp;	char filepath[20];	struct student *p1,*p2;	N2=0;	printf("輸入要讀入的文件路徑:");	getchar();	gets(filepath);	if((fp=fopen(filepath,"r"))==NULL) 	{		printf("找不到%s文件!/n",filepath);		exit(0);	}	p1=p2=(struct student*)malloc(sizeof(struct student));	fread(p1,sizeof(struct student),1,fp);	head2=NULL;	while(!feof(fp)) 	{		i=0;		N2=N2+1;		if(N2==1)head2=p1; else p2->next=p1;		p2=p1;		p1=(struct student * )malloc(sizeof(struct student));		fread(p1,sizeof(struct student),1,fp);	}	p2->next=NULL;}void inputs()//錄入學(xué)生信息主函數(shù) {	int i;	printf("/t/t/t錄入學(xué)生信息/n");	printf("/n1.從鍵盤(pán)錄入/n");	printf("2.從文件錄入/n");	printf("3.返回主菜單/n");	printf("請(qǐng)選擇(1~3):/n");	scanf("%d",&i);	switch(i) 	{		case(1):keyboards();		break;		case(2):files();		break;		case(3):break;	}}void inserts(struct student * incouse)//學(xué)生信息管理子函數(shù)(填加學(xué)生信息) {	struct student *p0,*p1,*p2;	p1=head2;	p0=incouse;	if(head2==NULL) 	{		head2=p0;		p0->next=NULL;	} else 	{		while((p0->num2 > p1->num2) && (p1->next!=NULL)) 		{			p2=p1;			p1=p1->next;		}		if(p0->num2 <= p1->num2) 		{			if(head2==p1) head2=p0; else p2->next=p0;			p0->next=p1;		} else 		{			p1->next=p0;			p0->next=NULL;		}	}	N2=N2+1;}void dels(int num2)//學(xué)生信息管理子函數(shù)（刪除學(xué)生信息) {	struct student *p1,*p2;	if(head2==NULL) 	{		printf("/n沒(méi)有該學(xué)生信息,無(wú)法刪除!/n");		goto end;	}	p1=head2;	while(num2!=p1->num2 && p1->next!=NULL) 	{		p2=p1;		p1=p1->next;	}	if(num2==p1->num2) 	{		if(p1==head2) head2=p1->next; else p2->next=p1->next;		printf("已刪除該學(xué)生信息!/n");		N2=N2-1;	} else printf("無(wú)該學(xué)號(hào)的學(xué)生!/n");	end:;}void managements()//學(xué)生信息管理主函數(shù) {	struct student * incouse;	int i,num2;	printf("/t/t/t學(xué)生信息管理/n");	printf("1.新增學(xué)生信息/n");	printf("2.刪除學(xué)生信息/n");	printf("3.返回主菜單/n");	printf("請(qǐng)選擇(1~3):/n");	scanf("%d",&i);	switch(i) 	{		case(1): 		{			incouse=(struct student *)malloc(sizeof(struct student));			incouse->nelen=0;			incouse->nelenum[0]=0;			printf("學(xué)生學(xué)號(hào)/t學(xué)生姓名/n");			scanf("%d%s",&incouse->num2,incouse->name2);			inserts(incouse);			break;		}		case(2): 		{			printf("請(qǐng)輸入要?jiǎng)h除學(xué)生的學(xué)號(hào):/n");			scanf("%d",&num2);			dels(num2);			break;		}		case(3):break;	}}void elect(struct student * s)//選課 {	struct couse * p;	int num1,i;	printf("請(qǐng)輸入要選課的編號(hào):/n");	scanf("%d",&num1);	for (i=0;s->nelenum[i]!=0;i++);	s->nelenum[i]=num1;	(s->nelen)++;	p=head1;	while(p->num1!=num1) p=p->next;	(p->nelepeo)++;}void cheak()//學(xué)生選課子函數(shù)(查詢(xún)可選課程) {	char e;	struct couse * c;	struct student * s;	int num2,i,j=0,t=0;	printf("請(qǐng)輸入你的學(xué)號(hào):");	scanf("%d",&num2);	s=head2;	while(s->num2!=num2 && s->next!=NULL) s=s->next;	if(s->num2!=num2) 	{		printf("不存在你的信息,請(qǐng)進(jìn)入主菜單錄入你的信息!/n");		goto end;	}	c=head1;	printf("你的可選課程編號(hào):/n");	while(c!=NULL) 	{		for (t=0,i=0;s->nelenum[i]!=0;i++) 		{			if(c->num1==s->nelenum[i]) t=1;		}		if(t==0 && (c->nelepeo!=c->Melepeo)) 		{			printf("%d/n",c->num1);			j++;		}		c=c->next;	}	if(j==0) 	{		printf("你已選完所有課程，無(wú)法再多選!/n");		goto end;	}	printf("選課(y/n)?:/n");	getchar();	e=getchar();	i=0;	while(e=='y') 	{		elect(s);		printf("繼續(xù)選課(y/n)?:/n");		getchar();		e=getchar();	}	end:;}void back(struct student * p)//退課 {	struct couse * p1;	int num1,i,j;	printf("請(qǐng)輸入你要退掉的課程編號(hào):/n");	scanf("%d",&num1);	p1=head1;	while(p1->num1!=num1) p1=p1->next;	for (i=0;p->nelenum[i]!=num1;i++);	for (j=i;p->nelenum[j]!=0;j++) p->nelenum[j]=p->nelenum[j+1];	p->nelenum[--j]=0;	(p1->nelepeo)--;	printf("退課成功!/n");}void hcheak()//學(xué)生選課子函數(shù)（查詢(xún)已選課程) {	char c;	struct couse * p0;	struct student * p;	int num2,i,f=0;	printf("請(qǐng)輸入學(xué)號(hào):/n");	scanf("%d",&num2);	p=head2;	while(p->num2!=num2 && p!=NULL) p=p->next;	if(p==NULL) 	{		printf("不存在你的信息,請(qǐng)回主菜單錄入信息:/n");		goto end;	}	printf("已選課程編號(hào):/n");	if(p->nelenum[0]==0) 	{		printf("你還沒(méi)選課!/n");		goto end;	}	for (i=0;p->nelenum[i]!=0;i++) 	{		printf("%d/n",p->nelenum[i]);		p0=head1;		while(p0->num1!=p->nelenum[i]) p0=p0->next;		f=f+p0->score;	}	printf("總學(xué)分:%d/n",f);	printf("是否進(jìn)行退課(y/n)?");	getchar();	c=getchar();	while(c=='y') 	{		back(p);		printf("繼續(xù)退課(y/n)?");		getchar();		c=getchar();		(p->nelen)--;	}	end:;}void elective()//學(xué)生選課主函數(shù) {	int i;	printf("/t/t/t學(xué)生選課/n");	printf("1.查詢(xún)可選課程/n");	printf("2.查詢(xún)已選課程/n");	printf("3.返回主菜單/n");	printf("請(qǐng)輸入(1~3):/n");	scanf("%d",&i);	switch(i) 	{		case(1):cheak();		break;		case(2):hcheak();		break;		case(3):break;	}}void listc()//輸出課程信息 {	struct couse * p;	p=head1;	printf("課程編號(hào) 課程名稱(chēng) 學(xué)分 課程已選人數(shù) 課程人數(shù)上限/n");	while(p!=NULL) 	{		printf("%-8d%10s%6d%8d%12d/n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo);		p=p->next;	}}void lists()//輸出學(xué)生信息 {	struct student * p;	p=head2;	printf("學(xué)生學(xué)號(hào) 學(xué)生姓名 已選課程數(shù)量/n");	while(p!=NULL) 	{		printf("%-4d %10s %6d/n",p->num2,p->name2,p->nelen);		p=p->next;	}}void intoc()//存儲(chǔ)課程信息 {	FILE * fp;	struct couse * p;	char filepath[30];	printf("輸入課程信息要保存的文件路徑:");	getchar();	gets(filepath);	if((fp=fopen(filepath,"w"))==NULL) 	{		printf("/n保存失敗!");		exit(0);	}	p=head1;	while(p!=NULL) 	{		fprintf(fp,"%d %s %d %d %d/n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo);		p=p->next;	}	fclose(fp);	printf("課程信息已保存在%s中!/n",filepath);}void intos()//存儲(chǔ)學(xué)生信息 {	FILE * fp;	struct student * p;	char filepath[30];	printf("輸入學(xué)生信息要保存的文件路徑:");	getchar();	gets(filepath);	if((fp=fopen(filepath,"w"))==NULL) 	{		printf("/n保存失敗!");		exit(0);	}	p=head2;	while(p!=NULL) 	{		fwrite(p,sizeof(struct student),1,fp);		p=p->next;	}	fclose(fp);	printf("學(xué)生信息已保存在%s中!/n",filepath);}void into()//存儲(chǔ)信息 {	int i;	printf("1.存儲(chǔ)課程信息/n");	printf("2.存儲(chǔ)學(xué)生信息/n");	printf("3.返回主菜單/n");	printf("請(qǐng)輸入(1~3)/n");	scanf("%d",&i);	switch(i) 	{		case(1):intoc();		break;		case(2):intos();		break;		case(3):break;	}}void store()//信息主函數(shù) {	int i;	printf("/t/t系統(tǒng)信息查看及存儲(chǔ)/n");	printf("1.查看課程信息/n");	printf("2.查看學(xué)生信息/n");	printf("3.存儲(chǔ)信息/n");	printf("4.返回主菜單/n");	printf("請(qǐng)輸入(1~4):/n");	scanf("%d",&i);	switch(i) 	{		case(1):listc();		break;		case(2):lists();		break;		case(3):into();		break;		case(4):break;	}}int main()//主函數(shù) {	int i;	start:	  printf("/n/t/t/t歡迎使用學(xué)生選課系統(tǒng)!/n");	printf("菜單:/n");	printf("1.錄入課程信息/n");	printf("2.課程管理/n");	printf("3.錄入學(xué)生信息/n");	printf("4.學(xué)生信息管理/n");	printf("5.學(xué)生選課/n");	printf("6.系統(tǒng)信息查看及存儲(chǔ)/n");	printf("7.退出系統(tǒng)/n");	printf("/n請(qǐng)輸入菜單選項(xiàng)(1~7):/n");	scanf("%d",&i);	if(i<1 || i>7) 	{		printf("輸入錯(cuò)誤,請(qǐng)重輸:/n");		goto start;	}	switch(i) 	{		case(1): 		{			system("cls");			inputc();			goto start;			break;		}		case(2): 		{			system("cls");			managementc();			goto start;			break;		}		case(3): 		{			system("cls");			inputs();			goto start;			break;		}		case(4): 		{			system("cls");			managements();			goto start;			break;		}		case(5): 		{			system("cls");			elective();			goto start;			break;		}		case(6): 		{			system("cls");			store();			goto start;			break;		}		case(7): 		{			system("cls");			printf("感謝使用本系統(tǒng)!/n/n再見(jiàn)!/n");		}	}	return(0);}