CHAPTER 4
POINTER
Q1.WAP in c to create, initialize and use pointer variable.
#include<stdio.h>
#include<conio.h>
int main()
{
int n;
int *ptr;
ptr=&n;
printf("enter the number:");
scanf("%d",&n);
printf("Given no is %d",*ptr);
return 0;
}
Q2.WAP in c to add two number using pointer.
#include<stdio.h>
#include<conio.h>
int main()
{
int n1,n2,sum=0;
int *ptr1,*ptr2;
ptr1=&n1;
ptr2=&n2;
printf("enter the two number:");
scanf("%d%d",&n1,&n2);
sum=*ptr1+*ptr2;
printf("sum is %d",sum);
return 0;
}
Q3.WAP in c to swap two number using pointer.
#include<stdio.h>
#include<conio.h>
int main()
{
int x=2,y=3,temp=0;
int *ptr1,*ptr2;
ptr1=&x;
ptr2=&y;
temp=*ptr1;
*ptr1=*ptr2;
*ptr2=temp;
printf("swap values \n x=%d ,y=%d",*ptr1,*ptr2);
return 0;
}
Q4.WAP in c to input and print array elements using pointer.
#include<stdio.h>
#include<conio.h>
int main()
{
int a[100],n,*ptr,i=0;
printf("enter the size of array:");
scanf("%d",&n);
printf("enter the elements of array:");
for(i=0;i<n;i++)
{
scanf("%d",&a[i]);
}
ptr=&a[0];
printf("inputed elements are\n");
for(i=0;i<n;i++)
{
printf("%d\n",*(&a[0+i]));
}
return 0;
}
#Pointer in Function.
Q1.WAP in c to swap the two number using pointer in function.
#include<stdio.h>
#include<conio.h>
void swap(int *,int *);
int main()
{ int a,b;
printf("enter the value of two number:");
scanf("%d%d",&a,&b);
printf("entered values are:\n");
printf("a=%d b=%d",a,b);
printf("\n");
printf("After swaping,values are :\n");
swap(&a,&b);
return 0;
}
void swap(int *x,int *y)
{ int temp=0;
temp=*x;
*x=*y;
*y=temp;
printf("a=%d b=%d",*x,*y);
}
