图书管理系统.cpp

图书馆管理系统

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

struct bookInfo{
	int num;
	char* name;
	char* publish;
	int price;
};

struct bookType{
   bookInfo bo[20];
   int num;
}book;

void DisplayMenu();
int choiceItem();
void Init(struct bookType*);
void PrintInfo();
void Print_aInfo(int);
void Input_aInfo(struct bookInfo*);
void Input_allInfo(struct bookType*,int num);
int search();
void search2();
void search3();
void Modify();
void main()
{

	int choice,index,c,MUNMAX;
	int *n[10];

	Init(&book);
	do{
	  choice=choiceItem();
	  switch (choice){
	    case 0:printf("\nWelcome to");break;
	    case 1:printf("How much do you want to enter?\n");
		   scanf("%d",&c);
		   MUNMAX=c;
		   Input_allInfo(&book,MUNMAX);break;
	    case 2:Input_allInfo(&book,1); break;
	    case 3:if ((index=search())!=-1)
		   Print_aInfo(index);
		   else printf("\n No eixst the book published by this publish.");
		   break;
	    case 4:PrintInfo();break;
	    case 5:search2();break;
	    case 6:search3();break;
	    case 7:Modify();break;
	  }
       }while(choice);
}

void DisplayMenu()
{
   printf("\n============================ MENU ================================");
   printf("\n Input more books' informations ................................ 1");
   printf("\n Input a book's informations ................................... 2");
   printf("\n Input a number and print books' informations .................. 3");
   printf("\n Show all the books..............................................4");
   printf("\n Input a name and print books' informations .................... 5");
   printf("\n Input a publish and print and books' information .............. 6");
   printf("\n Modify book's information ..................................... 7");
   printf("\n exit system ................................................... 0");
   printf("\nchoice,please:");
}

int choiceItem()
{
   int choice;
   do{
     DisplayMenu();
     scanf("%d",&choice);
   }while(choice<0||choice>7);
   return choice;
}

void Init(struct bookType* s)
{
    s->num=0;
}

void Print_aInfo(int index)
{
     printf("\n%4d %-16s",book.bo[index].num,book.bo[index].name);
     printf("%4s%6.1d",book.bo[index].publish,book.bo[index].price);
}

void PrintInfo()
{
     int i;
     if(book.num==0) {
       printf("\nNo book.");
       return;
     }
     for (i=0;i<book.num;i++){
	printf("\n%4d %-16s",book.bo[i].num,book.bo[i].name);
	printf("%4s%6.1d",book.bo[i].publish,book.bo[i].price);
     }
}

void Input_aInfo(struct bookInfo* as)
{
	printf("\nEnter the number:");
	scanf("%d",&as->num);
	as->name=(char*)malloc(30);
	printf("\nEnter the name:");
	scanf("%s",as->name);getchar();
	as->publish=(char*)malloc(30);
	printf("\nEnter the publish:");
	scanf("%s",as->publish);
	printf("\nEnter the price:");
	scanf("%d",&as->price);
}

void Input_allInfo(struct bookType* s,int num)
{   int i,MUNMAX;
    printf("\nEnter %d infomations.\n",num);
    for (i=0;i<num;i++){
       if (s->num==MUNMAX){
	 printf("\nOverflow.");
	 break;
       }
       Input_aInfo(&s->bo[s->num++]);
    }
}

int search()
{
   int num,i;
   printf("\nEnter num:");
   scanf("%d",&num);
   for (i=0;i<book.num;i++)
      if (book.bo[i].num==num)
	 return i;
   return -1;
}

void search2()
{
   int h,i,j,k,sign=0,sign1=0;
   char as[15];
   printf("\nEnter the name of book you look for:");
   scanf("%s",as);
   for(h=0;h<book.num;h++)
   for(i=0;book.bo[h].name[i];i++)
     {
     sign=0;
     for(j=i,k=0;book.bo[h].name[j]==as[k];j++,k++)
	if(!as[k+1])
	 {sign=1;
	  sign1=1;}
     if(sign){
     printf("\n%4d %-16s",book.bo[h].num,book.bo[h].name);
     printf("%4s%6.1d",book.bo[h].publish,book.bo[h].price);
	     }
     }
   if(!sign1) printf("\nsorry,do not exist a book with this name;");
}

void search3()
{
   int i,j,a=0,b=0;
   char as[10];
   printf("\nEnter the publish of the book you look for:");
   scanf("%s",as);
   a=strlen(as);
   for(i=0;book.bo[i].name!=0;i++)
      {for(j=0,b=0;book.bo[i].publish[j]!=0;j++)
	  {if(book.bo[i].publish[j]==as[j])
	     b++;}
	     if(a==b){
	     printf("\n%4d %-16s",book.bo[i].num,book.bo[i].name);
	     printf("%4s%6.1d",book.bo[i].publish,book.bo[i].price);
	     }
	  }
      }



void Modify()
{  int a,i,j,sig=0;
   printf("\nEnter the number:");
   scanf("%d",&a);
   for(i=0;i<book.num;i++)
     if(book.bo[i].num==a)
       {
       sig=1;
       break;
       }
   if(sig==1)
    {
     for(j=i;j<book.num;j++)
       book.bo[j]=book.bo[j+1]; 
     book.num--;
     printf("\nbook have deleted.");
    }
   else
     printf("\nsorry,do not exist book with this number.");
}


/*书名不要为空，否则有BUG  书名不可含空格。。。。*/