Structures and Unions

Book Shop Inventory

#include <stdio.h>
struct record
{
char author[20];
char title[30];
float price;
struct
{
char month[10];
int year;
}
date;
char publisher[10];
int quantity;
};
int look_up(struct record table[],char s1[],char s2[],int m);
void get(char string[]);
void main()
{
char title[30],author[20];
int index, no_of_records;
char response[10],quantity[10];
struct record book[] = {
{"Ritchie","C Language",45.00,"May",1977,"PHI",10},
{"Kochan","Programming in C",75.50,"July",1983,"Hayden",5},
{"Balagurusamy","BASIC",30.00,"January",1984,"TMH",0},
{"Balagurusamy","COBOL",60.00,"December",1988,"Macmillan",25}
};
no_of_records = sizeof(book)/sizeof(struct record);
do
{
printf("Enter title and author name as per the list\n");
printf("\Title:  ");
get(title);
printf("Author: ");
get(author);
index=look_up(book,title,author,no_of_records);
if(index != -1)
{
printf("\n%s %s %.2f %s %d %s\n\n",book[index].author,
book[index].title,
book[index].price,
book[index].date.month,
book[index].date.year,
book[index].publisher);
printf("Enter number of copies:");
get(quantity);
if(atoi(quantity)<book[index].quantity)
printf("Cost of %d copies = %.2f\n",atoi(quantity),book[index].price*atoi(quantity));
else
printf("\nRequired copies not in stock\n\n");
}
else
printf("\nBook not in list\n\n");
printf("\nDo you want any other book? (YES/NO):");
get(response);
}
while(response[0] == 'Y' || response[0] == 'y');
printf("\n\nThank you. Good bye!\n");
getch();
}
void get(char string[])
{
char c;
int i=0;
do
{
c=getchar();
string[i++]=c;
}
while(c!='\n');
string[i-1]='\0';
}
int look_up(struct record table[],char s1[],char s2[], int m)
{
int i;
for(i=0;i<m;i++)
if(strcmp(s1,table[i].title)==0 && strcmp(s2,table[i].author)==0)
return(i);
return(-1);
}