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C project on Library Manageent -v1

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/*
Program: Library Management
Author: CppBuzz
Date: 17th Nov 2017
*/

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct library
{
char bk_name[30];
char publisher[30];
float price;
};

int main()
{
struct library l[100];
char pb_nm[30],bk_nm[30];
int i,j, keepcount;
i=j=keepcount = 0;

while(j!=5)
{
printf("\n\n1. Add book information\n");
printf("2. Display All Books Available \n");
printf("3. Display Highest Price Book\n");
printf("4. Display list of Publishers\n");
printf("5. Exit");

printf ("\n\nEnter one of the above : ");
scanf("%d",&j);

	switch (j)
	{
	/* Add book */
	case 1:  

		printf ("Enter book name = ");
		scanf ("%s",l[i].bk_name);
		
		printf ("Enter publisher name = ");
		scanf ("%s",l[i].publisher);

		printf ("Enter price = ");
		scanf ("%f",&l[i].price);
		keepcount++;

		break;
	case 2:
		printf("Display All Books Available\n");
		for(i=0;i<keepcount;i++)
		{
		printf ("\n book name = %s",l[i].bk_name);
		
		printf ("\t author name = %s",l[i].publisher);

		printf ("\t  price = %f",l[i].price);
		}
		break;

	case 3:
		printf ("Highest Price Book : ");
    float temp = 0;
		for (i=0;i<keepcount;i++)
		{
		    if(temp < l[i].price)
		        temp = l[i].price;
		}
		printf("%f", temp);
		
		break;

	case 4:
		printf ("List of Publishers : ");
		for (i=0;i<keepcount;i++)
		{
		    printf ("\n %s ",l[i].publisher);
		}
		break;

	case 5:
		exit (0); 
	}
}
return 0;
}