Question

What are structures? Comment on nested structures. Write a program to read Title, Author and price of 10 books using array of structures. Display the records in ascending order of Price.

Answer 1

Structure:
1. Structure is a collection of multiple data elements that can be of different data types.
2. Array is a collection of data items of same type, while structure can have data items of different types.
3. The memory space required to store one variable of structure is equal to the memory space required by all the elements independently to be stored in memory.
4. syntax
struct structure_name

{
data_type variable_name;
data_type variable_name;
-
-
}
Program:
#include <stdio.h>
struct book
{
int price;
char title[80];
char author[80];
};
void accept(struct book list[80], int s);
void display(struct book list[80], int s);

void bsortDesc(struct book list[80], int s);
void main()
{
struct book data[20];
int n;
clrscr();
accept(data,10);
bsortDesc(data, 10);
display(data, 10);
getch();
}
void accept(struct book list[80], int s)
{
int i;
for (i = 0; i < s; i++)
{
printf("\nEnter title : ");
scanf("%s", &list[i].title);
printf("Enter Author name: ");
scanf("%s",&list[i].author);
printf("Enter price : ");
scanf("%d", &list[i].price);
}

}
void display(struct book list[80], int s)
{
int i;
printf("\n\nTitle\t\tAuthor\t\tprice\n");
printf("-------------------------------------\n");
for (i = 0; i < s; i++)
{
printf("%s\t\t%s\t\t%d\n", list[i].title, list[i].author, list[i].price);
}
}
void bsortDesc(struct book list[80], int s)
{
int i, j;
struct book temp;
for (i = 0; i < s ; i++)
{
for (j = 0; j < (s -i); j++)
{
if (list[j].price > list[j + 1].price)
{
temp = list[j];
list[j] = list[j + 1];
list[j + 1] = temp;
}

}
}
}

Output:
Enter Title: physics
Enter Author name: Einstein
Enter Price:1000

Enter Title:english
Enter Author name:willey
Enter Price:900

Enter Title:chemistry
Enter Author name:narayan
Enter Price:800

Enter Title:history
Enter Author name:george
Enter Price:700

Enter Title:geography
Enter Author name:bailey
Enter Price:600

Enter Title:AOA
Enter Author name:Koreman
Enter Price:500

Enter Title:SPA
Enter Author name:Harish
Enter Price:400

Enter Title:Maths
Enter Author name:kumbhojkar
Enter Price:300

Enter Title:CG
Enter Author name:hern
Enter Price:200

Enter Title:python
Enter Author name:naryan
Enter Price:100

Title	Author	price
Python	Narayan	100
CG	hern	200
Maths	kumbhojkar	300
SPA	Harish	400
AOA	koreman	500
Geography	bailey	600
History	George	700
Chemistry	Narayan	800
English	willey	900
Physics	Einstein	1000