Program to find and display area, circumference and diameter of a circle in C++.

Write a C++ program to find and display area, circumference and diameter of a circle.

 Source code:

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

float r,area,circum,diameter;

 

cout<<"Enter radius-";

cin>>r;

 

area=3.14*r*r;

circum=2*3.14*r;

diameter=2*r;

 

cout<<"Area="<<area<<endl;

cout<<"Circumference="<<circum<<endl;

cout<<"Diameter="<<diameter<<endl;

 

getch();

}

 

 Output:

 

Program to find display area, perimeter and diagonal of a rectangle in C++.

 Q)Write a C++ program to find display area, perimeter and diagonal of a rectangle.

 Source code:

#include<iostream.h>

#include<conio.h>

#include<math.h>

void main()

{

clrscr();

float l,b,area,perimeter,d;

 

cout<<"Enter length and breadth-";

cin>>l>>b;

 

area=l*b;

perimeter=2*(l+b);

d=sqrt(pow(l,2)+pow(b,2));

 

cout<<"Area="<<area<<endl;

cout<<"Perimeter="<<perimeter<<endl;

cout<<"Diagonal="<<d<<endl;

 

getch();

}

 

 Output:

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Program to find and display simple interest and compound interest in C++.

Q) Write a C++ program to find and display simple interest and compound interest.

 Source code:

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

float p,r,t,si,ci;

 

cout<<"Principle amount-";

cin>>p;

cout<<"Rate of interest-";

cin>>r;

cout<<"Time period-";

cin>>t;

 

si=(p*r*t)/100;

ci=((p*(1+r)/100)*t)-p;

 

 

cout<<"Simple interest="<<si<<endl;

cout<<"Compound interest="<<ci<<endl;

 

getch();

}

 Output:

Program to find and display area and perimeter of a square in C++.

Q) Write a program to find and display area and perimeter of a square in C++.

Source code:

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int side,area,perimeter;

cout<<"Enter side-";

cin>>side;

area=side*side;

perimeter=4*side; 

cout<<"Area="<<area<<endl;

cout<<"Perimeter="<<perimeter<<endl;

getch();

}

Output:

  

 

 

Program to find and display the Sum, Average and Product of three numbers.

 Q) Write a program to find and display the sum, average and product of three numbers entered by the user.

Source code:

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int n1,n2,n3,total,avg,product;

cout<<"Enter 3 numbers"<<endl;

cin>>n1>>n2>>n3;

total=n1+n2+n3;

avg=(n1+n2+n3)\/3;

product=n1*n2*n3;

cout<<"Total="<<total<<endl;

cout<<"Average="<<avg<<endl;

cout<<"Product="<<product<<endl;

getch();

}

Output:

Program to display Sum of two Numbers

 3) Write a Program to display Sum of two numbers entered by the user.

Source Code:

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int n1,n2,sum;

        cout<<"Enter two numbers"<<endl;

cin>>n1>>n2;

sum=n1+n2;

cout<<"Sum="<<sum;

getch();

}

Output:

Use of \t in C++ with an example.

 Use of \t in C++

'\t' is a horizontal tab . It is used for giving tab space horizontally in your output

For example, 

Write a C++ program to display the following-

Name          Marks

Raj            76.5

Geeta          85.5

Simmy       93.5

Source code:

#include<iostream.h>

#include<conio.h>

void main()

{       clrscr();

         cout<<"Name\t\tMarks"<<endl;

         cout<<"Raj\t\t76.5"<<endl;

         cout<<"Geeta\t\t85.5"<<endl;

         cout<<"Simmy\t\t93.5"<<endl;

        getch();

}

Output: