Program -1 : Write a program to
demostrate the use of Address (&) and Pointer (*) operators
#include<stdio.h>
#include<conio.h>
void
main()
{
int a,*p;
clrscr();
printf("Enter Any Value :
");
scanf("%d",&a);
p=&a;
printf("\n\nValue Of a (1st way):
%d",a);
printf("\n\nAddress Of a:
%u",&a);
printf("\n\nAddress Of a:
%u",p);
printf("\n\nValue Of a (2nd way):
%d",*p);
printf("\n\nValue Of a (3rd way):
%d",*(&a));
printf("\n\nAddress Of p:
%u",&p);
getch();
}
Program -2 : Write a program to display the contents of
the variable their address using pointer variable of different data type
#include<stdio.h>
#include<conio.h>
void
main()
{
int
num,*intptr;
float x,
*floptr;
char ch,
*cptr;
clrscr();
num=1234;
x=12.34;
ch='a';
intptr=#
cptr=&ch;
floptr=&x;
printf("\n
Num %d stored at address %u",*intptr,intptr);
printf("\n
Value %f stored at address %u",*floptr,floptr);
printf("\n
Character %c stored at address %u",*cptr,cptr);
getch();
}
Program -3 : Write a program to demostrate the use of
increment and decrement operation using
pointer
#include<stdio.h>
#include<conio.h>
void
main()
{
int a,*p;
clrscr();
p=&a;
printf("\n\nEnter Any Value :");
scanf ("%d",p);
clrscr();
printf("\n\nValue Of a : %d",*p);
++(*p);
printf("\n\nValue After Increment : %d",*p);
--(*p);
printf("\n\nValue After Decrement : %d",*p);
getch();
}
Program -4 : Write a program to swap values using
pointer.
#include<stdio.h>
#include<conio.h>
void
main()
{
int a,b,*p,*q,*t;
clrscr();
printf("\n\nEnter The Value Of a :");
scanf ("%d",&a);
printf("\n\nEnter The Value Of b :");
scanf ("%d",&b);
p=&a;
q=&b;
printf("\n Before swap");
printf("\n a = value %d Address =
%u",a,p);
printf("\n b = value =%d Address
=%u",b,q);
t=p;
p=q;
q=t;
printf("\n After swap");
printf("\n\n Value Of a : %d",*p);
printf("\n\n Value Of b : %d",*q);
getch();
}
Program -5 : Array and pointer
#include<stdio.h>
#include<conio.h>
void
main()
{
int a[] = {1,2,3,4,5};
int *p,i;
clrscr();
p=&a[0]; // assign base address
for(i=0;i<5;i++)
{
printf("\n Number = %d
Address = %u",*(p),p); //*(p+i),p+i
p++;
}
getch();
}
Program -6 : Write a program to read and print value
stored in one-dimensional array using
pointer.
#include<stdio.h>
#include<conio.h>
void
main()
{
int a[50],i,n,*p;
clrscr();
printf("\n\n Enter how many
number : ");
scanf("%d",&n);
p=a;
for(i=0;i<n;i++)
{
printf("\n Enter The
Value Of a[%d] : ",i);
scanf("%d",p); //a[i]
p++;
}
p=a;
printf("\n
----------------------------\n");
printf("\n Address\t
Value");
printf("\n
----------------------------");
for(i=0;i<n;i++)
{
printf("\n\n %u \t a[%d] : %d",p, i, *p ); //a+i *(a+i)
p++;
}
getch();
}
Program -7 : Write a program using pointer to compute
the sum and average of all elements
stored in an array.
#include<stdio.h>
#include<conio.h>
void
main()
{
int a[50],*p,i,n,sum=0;
float avg;
clrscr();
printf("\n\n Enter How many
number : ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("\n\n Enter The
Value Of a[%d] : ",i);
scanf("%d",&a[i]);//p+i
}
p=a;
printf("\n
----------------------------\n");
printf("\n Address\t
Value");
printf("\n
----------------------------");
for(i=0;i<n;i++)
{
printf("\n\n %u \t a[%d] : %d",p, i, *p);
sum = sum + *(p);
p++;
}
avg=(float)sum/n;
printf("\n\n
----------------------------\n");
printf("\n\t\t Sum : %d \n",sum);
printf("\n\t Average : %f",avg);
printf("\n
----------------------------");
getch();
}
Program -8 : Write a
program to count total odd and even
number and calculate sum and average of odd and even numbers using pointer and
array.
#include<stdio.h>
#include<conio.h>
void
main()
{
int
a[50],*p,n,i,even=0,odd=0,oddsum=0,evensum=0;
float oddavg,evenavg;
clrscr();
printf("\n\n Enter How many
number : ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("\n\n Enter The
Value Of a[%d] : ",i);
scanf("%d",&a[i]);
}
p=a;
printf("\n
----------------------------\n");
printf("\n Address\t
Value");
printf("\n
----------------------------");
for(i=0;i<n;i++)
{
printf("\n\n %u \t a[%d] : %d",p, i, *p);
if(*(p)%2==0)
{
even++;
evensum=evensum+*p;
}
else
{
odd++;
oddsum=oddsum+*p;
}
p++;
}
oddavg=(float)oddsum/odd;
evenavg=(float)evensum/even;
printf("\n
-----------------------\n");
printf("\n Total No. Of Odd : %d",odd);
printf("\n Sum Of Odd : %d",oddsum);
printf("\n Average : %f",oddavg);
printf("\n
-----------------------\n");
printf("\n Total No. Of Even :
%d",even);
printf("\n Sum Of Even : %d",evensum);
printf("\n Average : %f",evenavg);
printf("\n
-----------------------");
getch();
}
Program -9 : Write a program to print positive and
negative number using pointer and
array.
//#include<stdio.h>
//#include<conio.h>
void
main()
{
int a[50],*p,n,i,pos=0,neg=0;
clrscr();
printf("\n\n Enter How many
number : ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("\n\n Enter The
Value Of a[%d] : ",i);
scanf("%d",&a[i]);
}
p=a;
for(i=0;i<n;i++)
{
printf("\n\n %u \t a[%d] : %d",p, i, *p);
if(*(p)>0)
{
pos++;
}
else
{
neg++;
}
p++;
}
printf("\n
--------------------------\n");
printf("\n
Total No. Of Positive : %d",pos);
printf("\n
--------------------------\n");
printf("\n
Total No. Of Negative : %d",neg);
printf("\n
--------------------------");
getch();
}
Program -10 : Write a program to
print sum of square of numbers using pointer and array.
#include<stdio.h>
#include<conio.h>
void
main()
{
int
a[50],*p,i,n,sum=0;
clrscr();
p=a;
printf("\n\n
Enter The Value Of n : ");
scanf("%d",&n);
clrscr();
for(i=0;i<n;i++)
{
printf("\n\n Enter The Value Of
a[%d] : ",i);
scanf("%d",p+i);
sum=sum+ (*(p+i) * *(p+i));
}
clrscr();
printf("\n
-----------------------------\n");
printf("\n
Sum Of Square Of Number : %d",sum);
printf("\n
-----------------------------\n");
getch();
}
Program -11 : Write a program to sort the numbers using
array and pointer
#include<stdio.h>
#include<conio.h>
void
main()
{
int a[50],*p,n,i,j,temp;
clrscr();
printf("\n\n Enter The Value Of n
: ");
scanf("%d",&n);
p=a;
for(i=0;i<n;i++)
{
printf("\n\n Enter The
Value Of a[%d] : ",i);
scanf("%d",p+i);
}
p=a;
printf("\n Unsorted list");
for(i=0;i<n;i++)
{
printf("\n
%d",*(p+i));
}
// sorting
for(i=0;i<n;i++)
{
for(j=i;j<n;j++)
{
if(*(p+i)>*(p+j)) //
if(a[i]>a[j])
{
temp=*(p+i); // temp=a[i]
*(p+i)= *(p+j); // a[i]=a[j]
*(p+j)=temp; // a[j]=temp
}
}
}
p=a;
printf("The Sorted Array is :
\n");
for(i=0;i<n;i++)
{
printf("\n
%d",*(p+i));
}
getch();
}
Program -12 : Write a program to find minimum and maximum
number using array
and pointer.
#include<stdio.h>
#include<conio.h>
void
main()
{
int a[50],*p,i,n,min,max;
clrscr();
printf("\n\n Enter how many
number : ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("\n\n Enter The
Value Of a[%d] : ",i);
scanf("%d",&a[i]);
}
min=a[0];
max=a[0];
p=a;
for(i=0;i<n;i++)
{
printf("\n %d",*p);
if(*(p+i) < min)
{
min = *(p);
}
if(*(p+i) > max)
{
max = *(p);
}
p++;
}
printf("\n
----------------------\n");
printf("\n Maximum Number is :
%d",max);
printf("\n
----------------------\n");
printf("\n Minimum Number is :
%d",min);
printf("\n
----------------------\n");
getch();
}
Program -13 : Write a program to
create matrix using pointer
#include<stdio.h>
#include<conio.h>
void
main()
{
int i,j;
int mat[3][3];
clrscr();
printf("\n Input
\n" );
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("\n
enter element [%d][%d] : ",i+1,j+1);
scanf("%d",&mat[i][j]);
}
}
printf("\n output
\n" );
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("%4d",*(*(mat+i)+j));
}
printf("\n");
}
getch();
}
Program -14 : Write a program to
find length of string using pointer
#include<stdio.h>
#include<conio.h>
void
main()
{
char *s;
int l=0;
clrscr();
printf("\n Enter any name : ");
gets(s);
printf("\n entered name : %s",s);
while(*s!='\0')
{
printf("\n %c at address %u",
*s,s);
s++;
l++;
}
printf("\n len = %d",l);
s--;
printf("\n Reverse");
while(l>0)
{
printf("\n %c at address
%u",*s,s);
s--;
l--;
}
getch();
}
Program – 15 : Write a program to
print string in reverse order using pointer
#include<stdio.h>
#include<conio.h>
void
main()
{
char *s;
int l=0;
clrscr();
printf("\n Enter any name : ");
gets(s);
printf("\n entered name : %s",s);
while(*s!='\0')
{
printf("\n %c at address %u",
*s,s);
s++;
l++;
}
printf("\n len = %d",l);
s--;
printf("\n Reverse");
while(l>0)
{
printf("\n %c at address
%u",*s,s);
s--;
l--;
}
getch();
}
Program -16 : Write a program to
check whether the string is palindrome or not
#include<stdio.h>
#include<conio.h>
void
main()
{
int l=0,i;
char *name,*s1,*s2,*s3;
clrscr();
printf("\n Enter Name : ");
gets(name);
printf("\n Printed string :
%s",name);
s1=name;
printf("\n----------------------------\n");
while(*name!='\0')
{
printf("\n\n %c and address =
%u",*name,name);
name++;
l++;
}
printf("\n\n length of string :
%d",l);
name--;
s3='\0';
s3=s2;
printf("\n----------------------------\n");
while(l>0)
{
*s2=*name;
printf("\n\n%c and address =
%u",*name,name);
name--;
l--;
s2++;
}
s2=s3;
printf("\n\n original string =%s
",s1);
printf("\n\nreverce string %s ",s2);
printf("\n----------------------------\n");
if(s1==s2)
printf("\n same
string");
else
printf("\n Palindrome string");
getch();
}
Program -17 : Array of pointers OR
array of string
#include<stdio.h>
#include<conio.h>
void
main()
{
char *name[5];
int i;
clrscr();
for(i=0;i<5;i++)
{
printf("\n Enter name %d ",i+1);
gets(name[i]);
}
for(i=0;i<5;i++)
{
printf("\n %s",name[i]);
}
getch();
}
Program -18 : Write a program to read and print value
stored in one-dimensional dynamic
array.(malloc)
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void
main()
{
int *a,i,n;
clrscr();
printf("\n\n Enter how many
number : ");
scanf("%d",&n);
a=(int *)malloc(n*sizeof(int));
for(i=0;i<n;i++)
{
printf("\n Enter The
Value Of a[%d] : ",i);
scanf("%d",&a[i]);
}
printf("\n
----------------------------\n");
printf("\n Address\t
Value");
printf("\n
----------------------------");
for(i=0;i<n;i++)
{
printf("\n %u a[%d] :
%d",&a[i],i,a[i] );
}
getch();
}
Program -19 : structure to pointer
#include<stdio.h>
#include<conio.h>
struct
emp
{
int no;
char name[15];
long int salary;
};
void
main()
{
struct emp *e;
clrscr();
printf("\n enter no : ");
scanf("%d",&e->no);
fflush(stdin);
printf("\n Enter name : ");
gets(e->name);
printf("\n Enter salary :
");
scanf("%ld",&e->salary);
printf("\n No Name Salary");
printf("\n %d %s
%ld",e->no,e->name,e->salary);
getch();
}
Program -20 : structure to pointer
for one or more data
#include<stdio.h>
#include<conio.h>
#include<malloc.h>
struct
stud
{
int rno;
char
name[20];
};
void
main()
{
struct stud *s;
int i,j,n;
clrscr();
printf("Enter No Of Student :
");
scanf("%d",&n);
s=(struct stud
*)malloc(n*sizeof(struct stud));
for (i=0;i<n;i++)
{
printf("\n\nEnter Roll
No : ");
scanf("%d",&s->rno);
fflush(stdin);
printf("\nEnter Name :
");
gets(s->name);
s++;
}
s=s-n;
for (i=0;i<n;i++)
{
printf("\n\nRoll No :
%d\tName :%s",s->rno,s->name);
s++;
}
getch();
}
Program -21 : Write a program for
array of structure using dynamic memory allocation
#include<stdio.h>
#include<conio.h>
#include<malloc.h>
struct
result
{
int rno;
char m[3];
int tot;
};
void
main()
{
Struct result
*r,temp;
int
i,j,n;
clrscr();
printf("Enter
No Of Student : ");
scanf("%d",&n);
r=(result
*)malloc(n*sizeof(result));
for (i=0;i<n;i++)
{
printf("\n\nEnter Roll No : ");
scanf("%d",&r->rno);
printf("\nEnter Mark1 : ");
scanf("%d",&(r->m[0]));
printf("\nEnter Mark1 : ");
scanf("%d",&(r->m[1]));
printf("\nEnter Mark1 : ");
scanf("%d",&(r->m[2]));
r++;
}
r=r-n;
clrscr();
printf("\n================================");
printf("\n||Roll
No||Mark1||Mark2||Mark3||");
printf("\n================================");
for
(i=0;i<n;i++)
{
printf("\n||
%d || %d ||
%d || %d ||",r->rno,r->m[0],r->m[1],r->m[2]);
r++;
}
printf("\n================================");
getch();
}
