Pointers WS - 2016

CHENNAI PUBLIC SCHOOL, ANNANAGAR

COMPUTER SCIENCE - CLASS XII WORKSHEET TOPIC : POINTERS

1)  Predict the output for the following code:

a)    #include <iostream.h>

void main()

{int *Queen,Moves[]={11,22,33,44};

Queen = Moves;

Moves[2]+=22;

cout<<"Queen@"<<endl;

*Queen-=11;

Queen+=2;<<"Next @"<<*Queen<<endl;

Queen++;

cout<<"Finally@"<<*Queen<<endl;

cout<<"New Origin @"<<Moves[0]<<endl;}

b)    #include <iostream.h>

#include <string.h>

void FUN(char *str)

{

int L,i,j;

L=strlen(str);

for(i=90;i>=65;i--)

for(j=0;j<L;j++)

if(str[j]==char(i)||str[j]==char(i+32))

cout<<str[j];

cout<<endl;

}

void main()

{

char *p="Christmas-2016";

FUN(p);

}

c) #include<iostream.h>

void main()

{int A[]={10,15,20,25,30};

int *p=A;

while(*p<30)

{

        if (*p%3!=0)

          *p=*p+2;

        else

          *p=*p+1;

        p++;}

for(int j=0;j<=4;++j)

{

  cout<<A[j]<<"*";

  if (j%3==0) cout<<endl;

}

cout<<A[4]*3<<endl;

}

d)          #include<iostream.h>

void main()

{int Numbers[]={2,4,8,10};

int *ptr=Numbers;

for(int c=0;c<3;++c)

{  cout<<*ptr<<"@";

  ptr++;}

cout<<endl;

for(c=0;c<4;c++)

{  (*ptr)*=2;

  --ptr;}

for(c=0;c<4;c++)

 cout<<Numbers[c]<<"#";

cout<<endl;}

e) #include <iostream.h>

#include <ctype.h>

#include <conio.h>

#include <string.h>

void PointersFun(char text[],int &count)

{

char *ptr=text;

int length=strlen(text);

for(;count<length-2;count+=2,ptr++)

{

*(ptr+count)=toupper(*(ptr+count));

}}

void main()

{

clrscr();

int position=0;

char data[]="ChangeString";

PointersFun(data,position);

cout<<data<<"@"<<position;

cout.write(data+3,4);

}

f) #include <iostream.h>

void main()

{char *Text=²AJANTA²;

int *P, Num[]={1,5,7,9};

P=Num;

cout<<*P<<Text<<endl;

Text++;

P++;

cout<<*P<<Text<<endl;

}

g) #include <iostream.h>

#include <string.h>

#include <conio.h>

char * MyFunction(char RECEIVE_TEXT[])

{

RECEIVE_TEXT+=5;

cout<<*RECEIVE_TEXT<<" "<<strlen(RECEIVE_TEXT)<<endl;

return RECEIVE_TEXT;

}

void main()

{

char *SAMPLETEXT="IMAGINATION";

cout<<MyFunction(SAMPLETEXT)<<endl;

SAMPLETEXT++;

*SAMPLETEXT=*SAMPLETEXT+3;

cout<<SAMPLETEXT;}

h) #include <iostream.h>

  void main()

  {

  int a=32,*ptr=&a;

  char ch=’A’.&cho=ch;

  cho+=a;*ptr+=ch;

  cout<<a<<” “<<ch<<endl;

  }

i) Distinguish between

     int *ptr=new int(5);

     int *ptr=new int[5];

j) What are the operators associated with pointer variable? Explain with example.

k) Illustrate the  use of “self-referential structures” with the help of an example.

 l) Differentiate between static and dynamic allocation of memory.