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C++ Practice programs 1

1. A program which accepts two numbers and displays the greater one

#include

using namespace std;

int main()

{

int num1,num2;

coutnum1;

coutnum2;

cout

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3. Write a program to calculate area of circle. #include

using namespace std;

int main()

{

float r,area;

cout>r;

area = 3.14*r*r;

cout

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6. Find the absolute value of a number entered by the user.

#include

using namespace std;

int main()

{

int a;

couta;

if(a>0)

cout

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8. Write a program to find the roots of a quadratic equation of type ax2+bx+c

where a is not equal to zero.

//a program to find the roots of a quadratic equation of type

//ax2+bx+c where a is not equal to zero.

//Programmed by:

//Date:

#include

#include

using namespace std;

int main()

{

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

couta>>b>>c;

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

if(d==0)

{

root1=(-b)/(2*a);

root2=root1;

cout

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9. The marks obtained by a student in 5 different subjects are input by the user.

The student gets a division as per the following rules:

Percentage above or equal to 60 - First division

Percentage between 50 and 59 - Second division

Percentage between 40 and 49 - Third division

Percentage less than 40 - Fail

Write a program to calculate the division obtained by the student

#include

using namespace std;

int main()

{

int sub1,sub2,sub3,sub4,sub5,average;

coutsub1>>sub2>>sub3>>sub4>>sub5;

average=(sub1+sub2+sub3+sub4+sub5)/5;

if(average>=60)

cout

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11. Write a program to find the factorial value of any number entered through the

keyboard.

#include

using namespace std;

int main()

{

int n,fact=1;

coutn;

while(n>=1)

{

fact*=n; n--;

}

cout

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13. What is the output of the following C++ program if the user enters number

5?

#include

using namespace std;

int main()

{

int a;

int b=4;

couta;

cout

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The for loop

15. Write a program to print following shapes (i) (ii)

(i) (ii) #include

using namespace std;

int main()

{

int i,j;

for(i=1;i

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(iii) (iv)

(iii)

#include

using namespace std;

int main()

{

int i,j,k;

for(i=1;i

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16. This program prompts user to enter an operator and 2 operands and generate

the expression result with the selected operator on the operands.

#include

using namespace std;

int main()

{

int num1,num2;

char op;

cout

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17. Write a program that accepts an integer from the user and checks if it is divisible

by 2, 3 or 5

#include

using namespace std;

int main()

{

int a;

couta;

if(a%2==0)

cout

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19. Write a program that that calculates square roots of numbers 1 to 99.

(Using the while loop)

#include

#include

using namespace std;

int main()

{

int num=1;

double sq_root;

while(num

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21. Write a C++ program that accepts mark out of 100 and calculates Grade based

on the following criteria

Mark out of 100 Grade

>= 80 A

>=60 B

>=50 C

>=40 D

=80)

cout

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22. Write a program that receives 3 integer numbers and display them in ascending

order from smallest to largest.

#include

using namespace std;

int main()

{

int a,b,c;

coutb>>c;

if((a>b)&&(b>c))

cout

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23. Write a C++ program that adds the even numbers between 0 and any positive

integer number given by the user.

// A program that adds the even numbers between 0 and any

// positive integer number given by the user.

// Programmed by: Your Name

// ID. No: Your ID Number

// Section:

// Date: Date of Program created

#include

using namespace std;

int main()

{

int num,sum=0;

coutnum;

for(int i=0;i

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24. Write a program that reads 10 integers from the keyboard and count how many

of them are larger than 50, and display this result

// A program that reads 10 integers from the keyboard

// and count how many of them are larger than 50

// Programmed by: Your Name

#include

using namespace std;

int main()

{

int a,b,c,d,e,f,g,h,i,j;

couta>>b>>c>>d>>e>>f>>g>>h>>i>>j;

cout50)

count++;

if(c>50)

count++;

if(d>50)

count++;

if(e>50)

count++;

if(f>50)

count++;

if(g>50)

count++;

if(h>50)

count++;

if(i>50)

count++;

if(j>50)

count++;

cout

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25. Write a program that reads 10 integers from the keyboard and count how many

of them are larger than 50, and display this result

(Using Array- will be discussed in chapter 5)

// A program that reads 10 integers from the keyboard

// and count how many of them are larger than 50

// Programmed by: Your Name

#include

using namespace std;

int main()

{

int num[10]; //

cout>num[i];

if (num[i] > 50)

count++;

}

cout