The document contains code for two C programs that use structures. The first program defines an employee structure with fields for ID, name, description, department, and salary. It then declares an array of employee structures, takes user input to populate the array, and prints the employee details. The second program defines nested structures - an address structure within a person structure. It takes user input to populate a person structure instance and prints the person's details.

1. //Program for array of a stucture
#include<stdio.h>
#include<conio.h>
void main()
{
struct employee
{
int id;
char n[20];
char des[30];
char dept[30];
float sal;
};
struct employee e[50];
int i,no;
clrscr();
printf("enter the no.of employees:n");
scanf("%d",&no);
printf("enter the details for %d personsn",no);
printf("emp_id,emp_name,emp_des,emp_dept &emp_salaryn");

2. for(i=0;i<no;i++)
{
scanf("%d%s%s",&e[i].id,&e[i].n,&e[i].des);
scanf("%s%f",&e[i].dept,&e[i].sal);
}
printf(""n************O/P**********n");
printf("nemp_idtemp_nametemp_destemp_dept temp_salaryn");
for(i=0;i<no;i++)
{
printf("%d%s%s",e[i].id,e[i].n,e[i].des);
printf("%s%f",e[i].dept,e[i].sal);
printf("n");
}
getch();
}

3. ***************O/P***************************
emp_id emp_name emp_des emp_dept emp_salary
1 hemant s/w_developer s/w._company 20000
2 sara Lecturer CSE 22000
3 charan Lecturer IT 25000

4. //Program for nested structure
#include<stdio.h>
#include<conio.h>
void main()
{
struct address
{
char land[30];
int strtno;
int hno;
char city[20];
};
struct date
{
int d;
int m;
int y;
};

5. struct person
{
int id;
char n[20];
int age;
struct date D;
struct address A;
};
struct person p;
int x;
clrscr();
printf("enter the details of the person:n");
printf("Id,name, agen");
scanf("%d%s%d",&p.id,&p.n,&p.age);
x=strupr(p.n);
//printf("%s",x);
printf("enter DOBn");
scanf("%d%d%d",&p.D.d,&p.D.m,&p.D.y);
printf("enter address land,strtno,hno,cityn");
scanf("%s%d%d%s",&p.A.land,&p.A.strtno,&p.A.hno,&p.A.city);

6. printf("n**********OUTPUT***********n");
printf("ID=%dnNAME=%snAGE=%dnDOB=%d/%d/%dnADDRESS=%st%dt%dt%s"
,p.id,x,p.age,p.D.d,p.D.m,p.D.y,p.A.land,p.A.strtno,p.A.hno,p.A.city);
getch();
}

7. Enter the details of the person:
Id,name,age
12
sara
24
enter DOB
05
04
1987
enter address land,strtno,hno,city
Mahakali_colliery
20
N/17
Chandrapur
******************OUTPUT********************
ID=12
NAME=SARA
AGE=24
DOB=05/04/1987
ADDRESS=Mahakali_colliery 20 N/17 Chandrapur