stuf.c

这是过去自己编写的一个初级Dos程序

		i++;
		gotoxy(43,i+5);
		printf("%-6s%-15s%-8.2f%-8.2f", p->no,p->name,p->sum,p->average);
		p=p->next;
	}
}

/*Copy data from one file to another*/
void copy()
{
	char outfile[10],infile[10];
	FILE *sfp,*tfp;
	STUDENT *p=NULL;
	puttext(2,2,22,8,ssmenu);
	BlackText(0,1,"File");
	BlackText(0,6,"Copy file          ");
	RedText(0,3,"Load               ");
	DrawFrame(4,7,60,9,0,7);
	gotoxy(5,8);
	cprintf("Enter infile name,for example c:\\f1\\te.txt:");
	gotoxy(49,8);
	printf("          ");
	gotoxy(49,8);
	scanf("%s",infile);
	if((sfp=fopen(infile,"rb"))==NULL)
	{
		gotoxy(5,8);
		cprintf("can not open input file                                ");
		getch();
	}
	else
	{
		gotoxy(5,8);
		cprintf("Enter outfile name,for example c:\\f1\\te.txt: ");
		gotoxy(50,8);
		printf("          ");
		gotoxy(50,8);
		scanf("%s",outfile);
		if((tfp=fopen(outfile,"wb"))==NULL)
		{
			gotoxy(5,8);
			cprintf("can not open output file                               ");
			getch();
		}
		else
		{
			while(!feof(sfp))
			{
				if(1!=fread(p,sizeof(STUDENT),1,sfp))
				break;
				fwrite(p,sizeof(STUDENT),1,tfp);
			}
			fclose(sfp);
			fclose(tfp);
			gotoxy(5,8);
			cprintf("File copied from \"%s\" to \"%s\" !!                    ",infile,outfile);
			getch();
		}
	}
}

/*Update a record*/
STUDENT *update(STUDENT *h)
{
	int i; int s;
	STUDENT *p;
	char n[11];
	char *ch[]={"Student Number: ","Student Name: ","Score1: ","Score2: ","Score3: "};
	gotoxy(2,11);
	printf("Input No. you want to update: ");
	scanf("%s",n);
	p=h;
	while(strcmp(p->no,n)&&p!=NULL)
	{
		p=p->next;
	}
	if(p==NULL)
	{
		DrawFrame(25,9,54,12,0,7);
		gotoxy(26,10);
		cprintf("list no %s student",n);
		getch();
	}
	else
	{
		ClrScr();
		gotoxy(43,3);
		printf("No.   Name           sc1  sc2  sc3  ");
		gotoxy(43,4);
		printf("%-6s%-15s%-5d%-5d%-5d", p->no,p->name,p->score[0],p->score[1],p->score[2]);
		for(i=0;i<5;i++)
		{
			gotoxy(5,3*i+5);
			printf("%s",ch[i]);
		}
		gotoxy(2,22);
		printf("Don't press ESC before you finish it.");
		gotoxy(2,23);
		printf("ID no more than 11 characters. Name no more than 15 characters.");
		gettext(5,5,36,17,Fuleft1);
		gotoxy(21,5);
		inputs(p->no,11);
		gotoxy(19,8);
		inputs(p->name,15);
		s=0;
		for(i=0;i<N;i++)
		{
			do
			{
				gotoxy(13,i*3+11);
				scanf("%d",&p->score[i]);
				if(p->score[i]>100||p->score[i]<0)
				{
					DrawFrame(25,9,54,12,WHITE,RED);
					gotoxy(26,10);
					cprintf("Bad data, please try again. ");
					gotoxy(26,11);
					cprintf("                            ");
					getch();
					puttext(25,9,54,12,infow);
					puttext(2,3,39,20,Fuleft);
				}
			}while(p->score[i]>100||p->score[i]<0);
			s=s+p->score[i];
		}
		puttext(5,5,36,17,Fuleft1);
		p->sum=s;
		p->average=(float)s/N;
		p->order=0;
		gotoxy(43,3);
		printf("No.   Name           sc1  sc2  sc3  ");
		gotoxy(43,4);
		printf("%-6s",p->no);
		printf("%-15s",p->name);
		for(i=0;i<3;i++)
		{
			printf("%-5d",p->score[i]);
		}
		DrawFrame(25,9,54,12,0,7);
		gotoxy(26,10);
		cprintf("have updated No %s student",s);
		gotoxy(26,11);
		cprintf("Don't forget save!");
		getch();
	}
	return(h);
}

/*Query by ID*/
void searchID(STUDENT *h)
{
	STUDENT *p;
	char s[11];
	gotoxy(2,11);
	printf("Input No. you want to search: ");
	scanf("%s",s);
	p=h;
	while(strcmp(p->no,s)&&p!=NULL)
		p=p->next;
	if(p==NULL)
	{
		DrawFrame(25,9,54,12,0,7);
		gotoxy(26,10);
		cprintf("list no %s student",s);
		getch();
		ClrScr();
	}
	else
	{
		ClrScr();
		gotoxy(43,3);
		printf("No.   Name           sc1  sc2  sc3  ");
		gotoxy(43,4);
		printf("%-6s%-15s%-5d%-5d%-5d", p->no,p->name,p->score[0],p->score[1],p->score[2]);
		getch();
	}
}

/*Query by name*/
void searchName(STUDENT *h)
{
	STUDENT *p;
	char s[15];
	gotoxy(5,10);
	printf("Input name you want to search: ");
	gotoxy(11,12);
	scanf("%s",s);
	p=h;
	while(strcmp(p->name,s)&&p!=NULL)
		p=p->next;
	if(p==NULL)
	{
		DrawFrame(25,9,54,12,0,7);
		gotoxy(26,10);
		cprintf("list no %s student",s);
		getch();
		ClrScr();
	}
	else
	{
		ClrScr();
		gotoxy(43,3);
		printf("No.   Name           sc1  sc2  sc3  ");
		gotoxy(43,4);
		printf("%-6s%-15s%-5d%-5d%-5d", p->no,p->name,p->score[0],p->score[1],p->score[2]);
		getch();
	}
}

/*Query by score*/
void searchGrades(STUDENT *h)
{
	STUDENT *p;
	int sc;
	int i;
	char flag;
	sc=0;
	i=4;
	gotoxy(3,10);
	printf("Which score you want to search:(1~3)");
	gotoxy(14,12);
	flag=getch();
	puttext(2,3,39,20,Nuleft);
	gotoxy(3,10);
	printf("    input score:                    ");
	gotoxy(20,10);
	scanf("%d",&sc);
	p=h;
	ClrScr();
	gotoxy(43,3);
	printf("No.   Name           sc1  sc2  sc3  ");
	switch(flag)
	{
		case '1':while(p!=NULL)
			 {
				p=p->next;
				if(p->score[0]==sc)
				{
					gotoxy(43,i);
					printf("%-6s%-15s%-5d%-5d%-5d", p->no,p->name,p->score[0],p->score[1],p->score[2]);
					i++;
				}
			}
			break;
		case '2':while(p!=NULL)
			 {
				p=p->next;
				if(p->score[1]==sc)
				{
					gotoxy(43,i);
					printf("%-6s%-15s%-5d%-5d%-5d", p->no,p->name,p->score[0],p->score[1],p->score[2]);
					i++;
				}
			}
			break;
		case '3':while(p!=NULL)
			 {
				p=p->next;
				if(p->score[2]==sc)
				{
					gotoxy(43,i);
					printf("%-6s%-15s%-5d%-5d%-5d", p->no,p->name,p->score[0],p->score[1],p->score[2]);
					i++;
				}
			}
			break;
		default: {
				DrawFrame(25,9,54,12,0,7);
				gotoxy(26,10);
				cprintf("list no score %d student",sc);
				getch();
				ClrScr();
			 }
	}
	getch();
	
}

/*create an index on ID*/
STUDENT *indexID(STUDENT *h)
{
	STUDENT *p,*q,*t,*h1;
	h1=h->next;
	h->next=NULL;
	while(h1!=NULL)
	{
		t=h1;
		h1=h1->next;
		p=h;
		q=h;
		while(strcmp(t->no,p->no)>0&&p!=NULL)
		{
			q=p;
			p=p->next;
		}
		if(p==q)
		{
			t->next=p;
			h=t;
		}
		else
		{
			t->next=p;
			q->next=t;
		}
	}
	DrawFrame(25,9,54,12,0,7);
	gotoxy(26,10);
	cprintf("index sucess!!!");
	getch();
	ClrScr();
	return h;
}

/*create an index on scores*/
STUDENT *indexGrades(STUDENT *h)
{
	STUDENT *p,*q,*t,*h1;
	char flag;
	h1=h->next;
	h->next=NULL;
	DrawFrame(25,9,54,12,0,7);
	gotoxy(26,10);
	cprintf("Which score: (1~3)");
	gotoxy(45,10);
	flag=getch();
	if(flag=='1')
	{
		while(h1!=NULL)
		{
			t=h1;
			h1=h1->next;
			p=h;
			q=h;
			while((t->score[0]<p->score[0])&&p!=NULL)
			{
				q=p;
				p=p->next;
			}
			if(p==q)
			{
				t->next=p;
				h=t;
			}
			else
			{
				t->next=p;
				q->next=t;
			}
		}
	}
	else if(flag=='2')
	{
		while(h1!=NULL)
		{
			t=h1;
			h1=h1->next;
			p=h;
			q=h;
			while((t->score[1]<p->score[1])&&p!=NULL)
			{
				q=p;
				p=p->next;
			}
			if(p==q)
			{
				t->next=p;
				h=t;
			}
			else
			{
				t->next=p;
				q->next=t;
			}
		}
	}
	else if(flag=='3')
	{
		while(h1!=NULL)
		{
			t=h1;
			h1=h1->next;
			p=h;
			q=h;
			while((t->score[2]<p->score[2])&&p!=NULL)
			{
				q=p;
				p=p->next;
			}
			if(p==q)
			{
				t->next=p;
				h=t;
			}
			else
			{
				t->next=p;
				q->next=t;
			}
		}
	}
	else
	{
		gotoxy(26,10);
		cprintf("Which score: (1~3)"   );
		getch();
		ClrScr();
	}
	DrawFrame(25,9,54,12,0,7);
	gotoxy(26,10);
	cprintf("index sucess!!!      ");
	getch();
	ClrScr();
	return h;
}

/*create an index on sum and average*/
STUDENT *indexSUM(STUDENT *h)
{
	STUDENT *p,*q,*t,*h1;
	h1=h->next;
	h->next=NULL;
	while(h1!=NULL)
	{
		t=h1;
		h1=h1->next;
		p=h;
		q=h;
		while((t->sum<p->sum)&&p!=NULL)
		{
			q=p;
			p=p->next;
		}
		if(p==q)
		{
			t->next=p;
			h=t;
		}
		else
		{
			t->next=p;
			q->next=t;
		}
	}
	DrawFrame(25,9,54,12,0,7);
	gotoxy(26,10);
	cprintf("index sucess!!!");
	getch();
	ClrScr();
	return h;
}


/*Save before exit*/
void saveChange(STUDENT *h)
{
	FILE *fp;
	STUDENT *p;
	char outfile[10];
	DrawFrame(25,9,54,12,0,7);
	gotoxy(26,10);
	cprintf("   Save change? Y/N");
	if(getch()=='n')print(head);
	else
	{
		gotoxy(26,10);
		printf("file:                 ");
		gotoxy(32,10);
		textbackground(BLACK);
		textcolor(WHITE);
		cprintf("No more than 8 chs. ");
		getch();
		gotoxy(32,10);
		textbackground(WHITE);
		textcolor(BLACK);
		cprintf("                     ");
		gotoxy(32,10);
		scanf("%s",outfile);
		if((fp=fopen(outfile,"wb"))==NULL)
		{
			gotoxy(26,10);
			printf("can not open file!!");
			getch();
			puttext(1,1,80,25,save);
		}
		p=h;
		while(p!=NULL)
		{
			fwrite(p,sizeof(STUDENT),1,fp);
			p=p->next;
		}
		fclose(fp);
		gotoxy(26,10);
		cprintf("        File saved!!    ");
		getch();
	}
}