Computer Programs

CONTENTSProgram List

1. //C++ Program to output an integer, a floating point number and a character2. //C++ Program to find the sum, difference, product and quotient of two integers3. //Program to enter two integers and find their sum and average4. //Program to enter velocity, acceleration and time and print final velocity formula v = u + a * t5. //Program to enter your age and print if you should be in grade 106. //Program to enter an integer and print if it is greater or less than 1007. //Program to enter the sale value and print the agent's commission8. //Program to switch between different cases9. //Program to enter the principal, rate & time and print the simple interest10. //Program to enter an integer and print if it is prime or composite11. //Program to enter a string and find its length12. //Program to enter salary and output income tax and net salary13. //Program to enter an integer and output the cube of that integer14. //Program to draw circles15. //Program to find the roots of a quadratic equation16. //Program to enter an integer and output it in the reversed form17. //Program to find the sum of either of the diagonals of a 4 x 4 matrix18. //Program to enter three integers and output the smallest integer using IF19. //Program to count the number of words and characters in a sentence20. //Program to enter an integer and find out if it is even or odd

1. //C++ Program to output an integer, a floating point number and a character

#include <iostream.h>

#include <conio.h>

void main()

{

clrscr();

int x = 10;

float y = 10.1;

char z = 'a';

cout << "x = " << x << endl;

cout << "y = " << y << endl;

cout << "z = " << z << endl;

getch();

}

Output-

x = 10

y = 10.1

z = a

2. //C++ Program to find the sum, difference, product and quotient of two integers


#include <conio.h>

void main()

{

clrscr();

int x = 10;

int y = 2;

int sum, difference, product, quotient;

sum = x + y;

difference = x - y;

product = x * y;

quotient = x / y;

cout << "The sum of " << x << " & " << y << " is " << sum << "." << endl;

cout << "The difference of " << x << " & " << "y << is " << difference << "." << endl;

cout << "The product of " << x << " & " << y << " is " << product << "." << endl;

cout << "The quotient of " << x << " & " << y << " is " << quotient << "." << endl;

getch();

}

Output-

The sum of 10 & 2 is 12.

The difference of 10 & 2 is 8.

The product of 10 & 2 is 20.

The quotient of 10 & 2 is 5.

3. //Program to enter two integers and find their sum and average



#include <conio.h>

void main()

{

clrscr();

int x,y,sum;

float average;

cout << "Enter 2 integers : " << endl;

cin>>x>>y;

sum=x+y;

average=sum/2;

cout << "The sum of " << x << " and " << y << " is " << sum << "." << endl;

cout << "The average of " << x << " and " << y << " is " << average << "." << endl;

getch();

}

Input- 8 6

Output- The sum of 8 and 6 is 14.

The average of 8 and 6 is 7.

4. //Program to enter velocity, acceleration and time and print final velocity formula : v = u + a * t


#include <conio.h>

void main()

{

clrscr();

int v,u,a,t;

cout << "Enter the velocity, acceleration, time as integers : " << endl;

cin>>u>>a>>t;

v=u+a*t;

cout << "The final velocity is " << v << "." << endl;

getch();

}

Input- 20 10 5

Output- The final velocity is 70.

5. //Program to enter your age and print if you should be in grade 10


#include <conio.h>

void main()

{

clrscr();

int age;

cout << "Enter your present age : " << endl;

cin>>age;

if(age==16)

{

cout << "Your present age is " << age << " years." << endl;

cout << "You are of the right age for joining grade 10 !" << endl;

}

else

{

cout << "Your present age is " << age << " years." << endl;

cout << "You are not of the right age for joining grade 10 !" << endl;

}

getch();

}

Input- 15

Output- Your present age is 15 years.

You are not of the right age for joining grade 10 !

6. //Program to enter an integer and print if it is greater or less than 100


#include <conio.h>

void main(){

clrscr();

int x;

cout << "Enter an integer : " << endl;

cin>>x;

if(x>100)

{

cout << x << " is greater than 100." << endl;

}

else

{

cout << x << " is less than 100." << endl;

}

getch();

}

Input- 74

Output- 74 is less than 100.

7. //Program to enter the sale value and print the agent's commission


#include <conio.h>

void main()

{

clrscr();

long int svalue;

float commission;

cout << "Enter the total sale value : " << endl;

cin>>svalue;

if(svalue<=10000)

{

commission=svalue*5/100;

cout << "For a total sale value of $" << svalue << ", ";

cout << "the agent's commission is $" << commission;

}

else if(svalue<=25000)

{




}

else if(svalue>25000)

{




}

getch();

}

Input- 26000

Output- For a total sale value of $26000, the agent's commission is $5200

8. //Program to switch between different cases


#include <conio.h>

int main()

{

clrscr();

int choice;

cout << "1. Talk" << endl;

cout << "2. Eat" << endl;

cout << "3. Play" << endl;

cout << "4. Sleep" << endl;

cout << "Enter your choice : " << endl;

cin>>choice;

switch(choice)

{

case 1 : cout << "You chose to talk...talking too much is a bad habit." << endl;

break;

case 2 : cout << "You chose to eat...eating healthy foodstuff is good." << endl;

break;

case 3 : cout << "You chose to play...playing too much everyday is bad." << endl;

break;

case 4 : cout << "You chose to sleep...sleeping enough is a good habit." << endl;

break;

default : cout << "You did not choose anything...so exit this program." << endl;

}

getch();

}

Input- 3

Output- You chose to play...playing too much everyday is bad.

9. //Program to enter the principal, rate & time and print the simple interest


#include <conio.h>

void main()

{

clrscr();

int x;

float sinterest,principal,rate,time;

for(x=4;x>=0;x--)

{

cout << "Enter the principal, rate & time : " << endl;

cin>>principal>>rate>>time;

sinterest=(principal*rate*time)/100;

cout << "Principal = $" << principal << endl;

cout << "Rate = " << rate << "%" << endl;

cout << "Time = " << time << " years" << endl;

cout << "Simple Interest = $" << sinterest << endl;

}

getch();

}

Input- 1000 5 3

Output- Principal = $1000

Rate = 5%

Time = 3 years

Simple Interest = $150

10. //Program to enter an integer and print if it is prime or composite


#include <conio.h>

#include <process.h>

void main()

{

clrscr();

int num1,x;


cin>>num1;

for(x=2;x<num1;x++)

{

if(num1%x==0)

{

cout << num1 << " is a composite number." << endl;

getch();

exit(0);

}

else

{

cout << num1 << " is a prime number." << endl;

getch();

exit(0);

}

}

}

Input- 23

Output- 23 is a prime number.

11. //Program to enter a string and find its length


#include <conio.h>

#include <string.h>

void main()

{

clrscr();

int slength;

char x[81]; //Allowing the user to input a maximum of 80 characters.

cout << "Enter the string : " << endl;

cin>>x;

slength=strlen(x);

cout << "The length of the string " << x << " is " << slength << "." << endl;

getch();

}

Input- goldfish

Output- The length of the string goldfish is 8.

12. //Program to enter salary and output income tax and net salary


#include <conio.h>

void main()

{

clrscr();

int itrate;

float salary,itax,nsalary=0;

cout << "Enter the salary : ";

cin>>salary;

if(salary>15000)

{

itax=salary*30/100;

itrate=30;

}

else if(salary>=7000)

{

itax=salary*20/100;

itrate=20;

}

else

{

itax=salary*10/100;

itrate=10;

}

nsalary=salary-itax;

cout << "Salary = $" << salary << endl;

cout << "Your income tax @ " << itrate << "% = $" << itax << endl;

cout << "Your net salary = $" << nsalary << endl;

getch();

}

Input- 12000

Output- Salary = $12000

Your income tax @ 20% = $2400

Your net salary = $9600

13. //Program to enter an integer and output the cube of that integer


#include <conio.h>

int cube(int x); //The prototype.

void main()

{

clrscr();

int a;

cout << "Enter an integer : ";

cin>>a;

cout << "The cube of " << a << " is : " << cube(a) << endl; //Call the function cube(a).

getch();

}

//Defining the function.

int cube(int x)

{

int y;

y=x*x*x;

return(y);

}

Input- 8

Output- The cube of 8 is : 512

14. //Program to draw circles


#include <conio.h>

#include <graphics.h>

#include <ctype.h>

#include <stdlib.h>

#include <stdio.h>

void main()

{

clrscr();

int gd=DETECT,gm,errorcode; //Requesting auto-detection.

//Initializing graphics and local variables.

initgraph(&gd,&gm,"d:\\bc3\\bgi"); //Path where graphics drivers are installed

//Reading result of initialization.

errorcode=graphresult();

//An error occured.

if (errorcode!=grOk)

{

cout << "Graphics error occured : \n" << grapherrormsg(errorcode) << endl;

cout << "Press any key to stop : ";

getch();

exit(1);

}

circle(200,200,50); //Drawing a circle having center(200,200) and radius(50).

getch();


getch();


getch();

closegraph();

}

Output- This graphics program draws three circles on the screen

15. //Program to find the roots of a quadratic equation


#include <conio.h>

#include <math.h>

int main()

{

clrscr();

float a,b,c,d,root1,root2;

cout << "Enter the 3 coefficients a, b, c : " << endl;

cin>>a>>b>>c;

if(!a){

if(!b)

cout << "Both a and b cannot be 0 in ax^2 + bx + c = 0" << "\n";

else

{

d=-c/b;

cout << "The solution of the linear equation is : " << d << endl;

}

}

else

{

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

if(d>0)

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

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

cout << "The first root = " << root1 << endl;

cout << "The second root = " << root2 << endl;

}

getch();

return 0;

}

Input- 4 4 -3

Output- The first root = 0.5

The second root = -1.5

16. //Program to enter an integer and output it in the reversed form


#include <conio.h>

void main()

{

clrscr();

long int num1,num2,rnum=0;


cin>>num1;

num2=num1;

do

{

rnum=rnum*10;

int digit=num1%10;

rnum+=digit;

num1/=10;

}

while(num1);

cout << "The integer you typed is " << num2 << "." << endl;

cout << "The reversed integer is " << rnum << "." << endl;

getch();

}

Input- 987

Output- The integer you typed is 987.

The reversed integer is 789.

17. //Program to find the sum of either of the diagonals of a 4 x 4 matrix


#include <conio.h>

void main()

{

clrscr();

int x;

int A[4][4],sum=0; //Reading the matrix.

cout << "Enter the elements of the matrix : " << endl;

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

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

{

cout << "Element " << x+1 << ", " << y+1 << " : ";

cin>>A[x][y];

}

//Sum of either of the diagonal elements.

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

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

if(x==y)

sum+=A[x][y];

else if(y==4-(1+1));

sum+=A[x][y];

cout << "Sum of either of the diagonal elements is : " << sum;

getch();

}

Input – 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Output- Sum of either of the diagonal elements is : 34

18. //Program to enter three integers and output the smallest integer using IF


#include <conio.h>

int main()

{

clrscr();

int x,y,z,smallest;

cout << "Enter 3 integers : ";

cin>>x>>y>>z;

smallest=x;

if(y<smallest)

smallest=y;

if(z<smallest)

smallest=z;

cout << "The smallest integer out of the 3 integers you typed ";

cout << x << ", " << y << " & " << z << " is : " << "\n" << smallest << "\n";

getch();

return 0;

}

Input- 82 78 86

Output- The smallest integer out of the 3 integers you typed 82, 78 & 86 is :

78

19. //Program to count the number of words and characters in a sentence


#include <conio.h>

void main()

{

clrscr();

int countch=0;

int countwd=1;

cout << "Enter your sentence in lowercase: " << endl;

char ch='a';

while(ch!='\r')

{

ch=getche();

if(ch==' ')

countwd++;

else

countch++;

}

cout << "\n Words = " << countwd << endl;

cout << "Characters = " << countch-1 << endl;

getch();

}

Input- this is a nice program

Output- Words = 5

Characters = 18

20. //Program to enter an integer and find out if it is even or odd


#include <conio.h>

void main()

{

clrscr();

int x;

cout << "Enter an integer : ";

cin>>x;

if(x%2==0)

cout << "The number " << x << " is even.";

else

cout << "The number " << x << " is odd.";

getch();

}

Input- 86

Output- The number 86 is even.

Computer Programs

Documents

Transcript of Computer Programs