it manual

COMPUTER SCIENCE:PROGRAM

MANUAL – 1

Vignesh.Raman: (11-A; CBSE)

PROGRAM 1: A PROGRAM TO ENTER MARKS FOR 5 SUBJECTS AND PRINT THEIR AVERAGE & PERCENTAGE OF MARKS.

CODE:

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

double marks1,marks2,marks3,marks4,marks5;

double ave=0.0;

double percent=0.0;

cout<<"Enter the marks in the first subject.";

cin>>marks1;

cout<<"Enter the marks in the second subject.";

cin>>marks2;

cout<<"Enter the marks in the third subject.";

cin>>marks3;

cout<<"Enter the marks in the fourth subject.";

cin>>marks4;

cout<<"Enter the marks in the fifth subject.";

cin>>marks5;

double total=marks1+marks2+marks3+marks4+marks5;

ave=total/5;

percent=(total/500)*100;

cout<<"The average marks is "<<ave;

cout<<"\nThe percentage is "<<percent<<"%";

getch(); }

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OUTPUT:

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PROGRAM 2: WRITE A PROGRAM TO ENTER THE NUMBER OF DAYS AND CONVERT THEM TO NUMBER OF YEARS, MONTHS, WEEKS AND REMAINING DAYS.

CODE:


#include<conio.h>

void main()

{

clrscr();

int days=0;

int years,months,weeks;

int days2=0;

cout<<"Enter the total number of days.";

cin>>days;

years=days/365;

days=days%365;

months=days/30;

days=days%30;

weeks=days/7;

days2=days%7;

cout<<"NUMBER OF YEARS: "<<years<<"\n";

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cout<<"NUMBER OF MONTHS: "<<months<<"\n";

cout<<"NUMBER OF WEEKS: "<<weeks<<"\n";

cout<<"NUMBER OF DAYS: "<<days2<<"\n";

getch();

}

OUTPUT:

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PROGRAM 3: WRITE A PROGRAM TO INPUT MARKS AND

OUTPUT THE GRADES BASED ON THE FOLLOWING CRITERIA

MARKS>=90 GRADE A+MARKS<90 and MARKS>=80 GRADE AMARKS<80 and MARKS>=70 GRADE BMARKS<70 and MARKS>=60 GRADE CMARKS<60 NOT ELLIGIBLE

CODE:


#include<conio.h>

void main()

{

clrscr();

double marks=0.0;

cout<<"Enter your marks out of 100";

cin>>marks;

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if(marks>=90)

{ cout<<"GRADE A+"; }

else if((marks<90)&&(marks>=80))

{ cout<<"GRADE A"; }


{ cout<<"GRADE B"; }


{ cout<<"GRADE C"; }

else

{ cout<<"NOT ELIGIBLE"; }

getch();

}

OUTPUT:

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PROGRAM 4: WRITE A PROGRAM TO ENTER TWO NUMBERS AND FIND THE GREATER NUMBER USING IF-ELSE

CODE:


#include<conio.h>

void main()

{

clrscr();

int num1;

cout<<"Enter first number";

cin>>num1;

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int num2;

cout<<"Enter second number";

cin>>num2;

if(num1>num2)

{

cout<<"\nFirst number is greater.";

}

else

{

cout<<"\nSecond number is greater.";

}

getch();

}

OUTPUT:

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PROGRAM 5: WRITE A PROGRAM TO FIND THE ROOTS OF A QUADRATIC EQUATION.

CODE:


#include<math.h>

#include<conio.h>

void main()

{

clrscr();

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int a,b,c;

double root1,root2,d;

cout<<"Enter a,b,c";

cin>>a>>b>>c;

root1=0;

root2=0;

d=0;

if(a==0)

{

cout<<"a is equal to zero. Not a quadratic equation.";

}

else

{

d=(b*b)-(4*a*c);

if(d>0)

{

root1=(-b+sqrt(d))/(2*a);

root2=(-b-sqrt(d))/(2*a);

cout<<"\nThe first root is "<<root1;

cout<<"\nThe second root is "<<root2;

}

else if(d==0)

{

root1=(-b+sqrt(d))/(2*a);

cout<<"\nRoots are equal. Root is "<<root1;

}

else

{

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cout<<"The roots are imaginary.";

}

}

getch();

}

OUTPUT:

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PROGRAM 6: WRITE A PROGRAM TO DESIGN A CALCULATOR USING NESTED IF

CODE:


#include<conio.h>

void main()

{

clrscr();

double num1=0.0;

double num2=0.0;

char choice;

cout<<"Enter the first number.";

cin>>num1;

cout<<"Enter the second number.";

cin>>num2;

cout<<"Enter the operator for the operation to be performed.";

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cin>>choice;

if(choice=='+')

{

double sum=num1+num2;

cout<<"\nThe sum of the 2 numbers is "<<sum;

}

else if(choice=='-')

{

double diff=(num1>num2)?(num1-num2):(num2-num1);

cout<<"\nThe difference of the 2 numbers is "<<diff;

}

else if(choice=='*')

{

double product=num1*num2;

cout<<"\nThe product of the 2 numbers is "<<product;

}

else if(choice=='/')

{

double quotient=(num1>num2)?(num1/num2):(num2/num1);

cout<<"\nThe quotient of the 2 numbers is "<<quotient;

}

else

{

cout<<"\nINVALID INPUT";

}

getch();

}

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OUTPUT:

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PROGRAM 7: WRITE A PROGRAM TO DESIGN A CALCULATOR USING SWITCH CASE

CODE:


#include<conio.h>

void main()

{

clrscr();

double num1=0.0;

double num2=0.0;

char choice;

cout<<"Enter the first number.";

cin>>num1;

cout<<"Enter the second number.";

cin>>num2;

cout<<"Enter the operator for the operation to be performed.";

cin>>choice;

switch(choice)

{

case '+':

{

double sum=num1+num2;

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cout<<"\nThe sum is "<<sum;

break;

}

case '-':

{

double diff=(num1>num2)?(num1-num2):(num2-num1);

cout<<"\nThe difference is "<<diff;

break;

}

case '*':

{

double product=num1*num2;

cout<<"\nThe product is "<<product;

break;

}

case '/':

{

double quotient=(num1>num2)?(num1/num2):(num2/num1);

cout<<"\nThe quotient is "<<quotient;

break;

}

default:cout<<"Invalid operator.";

}

getch();

}

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OUTPUT:

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PROGRAM 8: WRITE A PROGRAM TO ENTER THE NUMBER OF A DAY AND PRINT ITS CORRESPONDING NAME.

CODE:


#include<conio.h>

void main()

{clrscr();

int day=0;

cout<<"Enter the number of days in a week";

cin>>day;

switch(day)

{

case 1:

{ cout<<"\nSUNDAY";

break;

}

case 2:

{cout<<"\nMONDAY";

break;

}

case 3:

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{ cout<<"\nTUESDAY";

break;

}

case 4:

{cout<<"\nWEDNESDAY";

break;

}

case 5:

{cout<<"\nTHURSDAY";

break;

}

case 6:

{cout<<"\nFRIDAY";

break;

}

case 7:

{cout<<"\nSATURDAY";

break;

}

default:cout<<"Invalid entry";

}

getch();

}

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OUTPUT:

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PROGRAM 9: WRITE A PROGRAM TO CALCULATE AREA OF TRIANGLE,CIRCLE OR RECTANGLE BASED ON USERS CHOICE

CODE:


#include<conio.h>

void main()

{

clrscr();

int choice=0;

cout<<"Enter your choice";

cout<<"\n\t 1 for area of the triangle";

cout<<"\n\t 2 for area of the circle";

cout<<"\n\t 3 for area of the rectangle";

cin>>choice;

switch(choice)

{

case 1:

{ double base, height;

cout<<"Enter the base measurement";

cin>>base;

cout<<"Enter the height measurement";

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cin>>height;

double area1=(base*height)/2;

cout<<"the area of triangle is:"<<area1<<"sq.units";

break;

}

case 2:

{ double radius;

cout<<"Enter the radius measurement";

cin>>radius;

double area2=(22*radius*radius)/7;

cout<<"\nArea of circle is "<<area2<<"sq.units";

break;

}

case 3:

{

double length,breadth;

cout<<"\nEnter length measurement.";

cin>>length;

cout<<"\nEnter the breadth measurement.";

cin>>breadth;

double area3=length*breadth;

cout<<"\nArea of rectangle is "<<area3<<"sq.units";

break;

}

default:cout<<"\nInvalid entry";

}

getch();

}

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OUTPUT:

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PROGRAM 10: WRITE A PROGRAM TO ACCEPT A THREE DIGIT NUMBER FROM THE USER AND CHECK IF IT IS A PALINDROME

CODE:


#include<conio.h>

void main()

{

clrscr();

int num1=0;

cout<<"Enter a three digit number";

cin>>num1;

int sum=0;

int num=num1;

int digit3=num1%10;

num1=num1/10;

sum=(sum*10)+digit3;

int digit2=num1%10;

num1=num1/10;


int digit1=num1%10;

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if(sum==num)

{ cout<<"It is a palindrome."; }

else

{ cout<<"It is not a palindrome"; }

getch();

}

OUTPUT:

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it manual

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average percentage of

double percent

marks5double ave

includevoid main