NCERT Solutions for Class 12 Computer Science (C++) – Pointers

Computer ncert solution of class 12 Computer Science (C++) – Pointers, we have covered all the chapter questions. This solution will prove to be beneficial for the board examination as well as for students who are preparing for graduate(B.Tech) in information technology and preparing for Post Graduate(M.C.A).

All the concepts of programming in this whole solution have been made quite accurate and authentic which will help you to make notes and also increase your interest in computer programming. This solution is based on the syllabus of NCERT Solutions for Class 12 Computer Science (C++) – Pointers, which will prove useful in the board exams and competitive exams as well.

"ncert solutions for class 12 computer science pdf", "ncert class 12 computer science c textbook pdf", "computer science class 12 sumita arora solutions", "ncert solutions for class 12 computer science python sumita arora", "class 12 computer science ncert solutions", "class 12 computer science practicals with solutions", "cbse class 12 computer science textbook solutions python", "ncert class 12 computer science python textbook pdf"

NCERT Solutions for Class 12 Computer Science (C++) having 14th Chapter whose Chapter wise Solution given below.

Very Short Answer Type Questions    [1 mark each]

Question 1:
Write the definition of a function FixPay (float Pay[ ], int N) in C+ + , which should modify each element of the array Pay having N elements, as per the following rules :

Existing Salary Value	Required Modification in Value
If less than 1,00,000	Add 25% in the existing value
If >=1,00,000 and <20,000	Add 20% in the existing value
If >=2,00,000	Add 15% in the existing value

Аnswer:

Void FixPay(float Pay[],int N)

{

for(int i=0;i<N;i++)

{

if(Pay[i]<100000)

Pay[i]+= Pay[i]*0.25;

else if(Pay[i]<200000)

Pay[i]+= Pay[i]*0.20;

else

Pay[i]+= Pay[i]*0.15 ;

 }

}

Question 2:
Write the definition of a member function INSERT() for a class QUEUE in C+ +, to remove a product from a dynamically allocated Queue of items considering the following code is already written as a part of the program.

Struct ITEM

{

int INO; char INAME[20];

ITEM*Link;

};

class QUEUE

{

ITEM *R,*F;

Public:

QUEUE(){R=NULL; F=NULL;}

void INSERT();

void DELETE();

~QUEUE();

};

Аnswer:

Void QUEUE::INSER()

{

ITEM*newitem = new ITEM;

Cout<<"enter item number";

cin>>newitem → INO;

Cout<<"Enter item name"; 

gets(newitem → INAME);

newitem → Link = NULL;

if (R==NULL)

R=F=newitem;

else

{

 R → Link=newitem;

 R = newitem;

}

Short Answer Type Questions-I

Question 1:
Write the output from the following C+ + program code :

#include<iostream.h>

#include<ctype.h>

void strcon(char s[])

{

for(int i=0,l=0;s[i]!='\0';i++,l++);

fortint j=0;j<l;j++)

{

if(isupper(s[j]))

s[j]=tolower(s[j])+2;

else if( islower(s[j]))

s[j]=toupper(s[j])-2;

else

s[j] ='@';

 }

}

void main()

{

char *c="Romeo Joliet";

strcon(c);

cout<<"Text="<<c<<endl;

c=c+3;

cout<<"New Text="<<c<<endl;

c=c+5-2 ;

cout<<"last Text= "<<c;

 }

Аnswer:
Text = tMKCM@lMJGCR
New Text = KCM@1MJGCR
Last Text = 1MJGCR

Question 2:
Obtain the output of the following C+ + program as expected to appear on the screen after its execution.
Important Note :
All the desired header files are already included in the code, which are required to run the code.void main()

{
char *Text="AJANTA"; int *P, Num[]={l,5,7,9}
P=Num;
cout <<*p<< Text <<endl;
Text++;
P++;
cout<<*P<<Text<<endl;
}

Аnswer:
1AJANTA
5JANTA

Question 3:
Obtain the output from the following C+ + program as expected to appear on the screen after its execution.
Important Note :
• Adi the desired header files are already included in the code, which are required to run the code.

void main()
{
char *String="SARGAM"; 
int *Ptr, a[]={1,5,7,9}; 
ptr=a;
cout<<*ptr<<String<<endl;
String++; 
ptr+=3;
cout<<*ptr<<String<<endl;
}

Аnswer:
1 SARGAM
9ARGAM

Question 4:
Give the output of the following program segment: (Assuming all desired header file(s) are already included)

void main()
{
float *Ptr, Points[] = {20,50,30,40,10};
Ptr = points; 
cout<<*Ptr<<endl;
Ptr+=2;
Points[2]+=2.5; 
cout<<*Ptr<<endl;
Ptr++;
(*Ptr)+=2.5; 
cout<<Points[3]<<endl;
}

Аnswer:
20.00 32.5
42.50

Question 5:
Find the output of the following code :
Important Note :
All the header files are already included in the code, which are required to run the code.

void main()
{
char *String="SHAKTI";
int*Point,Value[]={10,15,70,19};
Point=Value;
cout<<*Point<<String<<endl;
String++;
Point++;
cout<<*Point<<String<<endl;
}

Аnswer:
10SHAKTI
15HAKTI

Question 6:
Write the output of the following C+ + program code :
Note : Assume all required header files are already being included in the program.

void change(int*s)
{
for(int i=0;i<4;i++)
{
if(*s<40)
{
if(*s%2==0)
*s=*s+10; 
else
*s=*s+ll; 
}
else
 {
if(*s%2==0)
*S=*S-10; 
else
*s=*s-ll;
}
cout<<*s<<" ";
s++;
}
}
void main()
{
int score[]={25,60,35,53 }; 
change(score);
}

Аnswer:
36 50 46 42

Short Answer Type Question-II

Question 1:
Find the output of the following program :

#include<iostream.h>
void in(int x,int y,int &z)
{
x+=y; 
y--;
z*=(x-y);
}
void out(int z,int y,int &x)
{
x*=y;
y++;
z/=(x+y);
}
void main()
{
int a=20, b=30, c=10;
out(a,c,b);
cout<<a<<"#"<<b<<"#"<<c<<"#"<<endl; 
in(b,c, a) ;
cout<<a<<"®"<<b<<"@"<<c<<"@"<<endl; 
out(a,b,c);
cout<<a<<"$"<<b<<"$"<<c<<"$"<<endl;
}

Аnswer:
20#300#10#
620@300@10@
620$300$3000$

Long Answer Type Questions

Question 1:
Find the output of the following code:

#include<iostream.h> 
void main()
{
int *Striker;
int Track[]={10,25,30,55}; 
Striker=Track; 
Track[1]+=30;
cout<<"Striker"<<*Striker<<endl; 
*Striker=-10;
Striker++;
cout<<"Next@"<<*Striker<<endl; 
Striker+=2;
cout<<"Last@"<<*Striker<<endl;
cout<<"Rest To"<<*Track[0]<<endl;
}

Аnswer:
Striker 10
Next@55
Last@55
Rest To 0

Question 2:
Find the output of the following code :

#include<iostream.h> 
void main()
{ 
int *Queen;
Moves[]={ll,22,33,44};
Queen=Moves;
Moves[2]+=22;
cout<<"Queen@"<<*Queen<<endl; 
*Queen-=ll;
Queen+=2;
cout<<”Now@"<<*Queen<<endl; 
Queen++;
cout<<"Finally@"<<*Queen<<endl;
cout<<"NewOrigin@"<<*Moves[0]<<endl; 
}

Аnswer:
Queen@11
Now@55
Finally@44
NewOrigin@0

NCERT Solutions for Class 12 Computer Science