Find Prime number with C++ Program

Do you know what is a prime number?
A natural number greater than 1 which has only two divisors 1 and it is called a prime number. For example: 7 is a prime number. Because it has only two divisors 1 and 7 (itself).




Now I am going to tell you how to find a prime number by using C++ program. Just type these code below

//C++ Program to find Prime number
#include<iostream.h>
#include<conio.h>
        void main()
        {
         //clrscr();
         int number,count=0;
cout<<"Enter number to check it is Prime or not ";
          cin>>number;
           for(int a=1;a<=number;a++)
               {
                if(number%a==0)
                   {
                  count++;
                   }
               }
       if(count==2)
         {
          cout<<" PRIME NUMBER \n";
         }
       else
         {
          cout<<" NOT A PRIME NUMBER \n";
         }
       //getch();
       }

Thanks! 

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C++ program to find the largest value among any four numbers

Today I am going to tell you how to find the largest value among any four numbers with a simple C++ program. You can also see how to find the largest value of any three numbers. 






Anyway, the C++ program code is bellow:

// A C++ program to find the largest value among any four numbers
#include <iostream.h>
void main(void)
{
 float a,b,c,d;
 cout << "Enter any four numbers \n";
 cin >>a >>b >>c >>d;
 if (a > b) {
if (a > c) {
if (a > d)
cout <<"Largest value" << a << endl;
else cout <<"Largest value" << d << endl;
}
else {
if (c > d)
cout <<"Largest value" << c << endl;
else cout <<"Largest value" << d << endl;
}
} // end of outer if part
else {
if (b > c) {
if (b > d)
cout <<"Largest value" << b << endl;
else cout <<"Largest value" << d << endl;
}
else {
if (c > d)
cout <<"Largest value" << c << endl;
else cout <<"Largest value" << d << endl;
}
} // end of outer else part
} // end of main program

Output:

Enter any four numbers 

10   40    50    70 

Largest value 70

Thanks! 

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A C++ program to find the largest value of any three numbers

Now I am telling you how to find the largest value of any three numbers with C++ program.

If you enter any three numbers you will get the largest value from these. It's so simple and easy program.




However, Let's start our program. 

#include <iostream.h>
void main( void)
{
 float x,y,z;
 cout << "Enter any three numbers \n";
 cin >> x >> y >> z;
 if (x > y) {
if (x > z)
cout <<"Largest value" << x << endl;
else
cout <<"Largest value" << z << endl;
}
else if (y > z)
cout <<"Largest value" << y << endl;
else
cout <<"Largest value" << z << endl;
} // end of main program

You can see this output:

Enter any three numbers
10     40      50
Largest value 50

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The program of compound interest in C

Today I am going to tell you how to get Compound Interest with C program. It is not very difficult. Very simple and easy program.

However, Let's start our program. Open your Turbo C program and enter the following codes:

#include <stdio.h>
#include <conio.h>
#include <math.h>
void main (){
float p, r, n, i, f;
clrscr ();
printf("Please enter a value for the principal (p) : );
scanf ("%f", &p);
printf("Please enter a value for the interest rate (r) : );
scanf ("%f", &r);
printf("Please enter a value for the number of Years (n) : );
scanf ("%f", &n);
i=r/100;
i=i+l
f=p*(pow (i,n));
printf ("\n The Final value (F) is : %. 3f",f);
getch ();
}

Then compile and run.

Thanks!

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Simple program in C++

Today I am going to tell you how to create a simple C++ program.

Suppose we would like to display the message “Hello world! This is my first program” on your video screen.

#include <iostream. h>
void main()  // program heading
  {  //  begin
     cout  << "Hello world! This is my first program";
  }  //  end

The function main() must be placed before the begin statement. It invokes another function to perform its job. The { symbol or notation is used as the begin statement. The declaration of variables and the type of operations are placed after the begin statement. The end statement is denoted by the symbol  }. In C++ , the semicolon (;) serves the purpose of the statement terminator rather than a separator.

 Statements are terminated by a semicolon and are grouped within braces {….}. Most statement contains expression, sequences of operators, function calls, variables and constants that specify computation.

Variable and function names are of arbitrary length and consist of upper and lower case letters, digits and underscore and they may not start with a numeral. All C++ keywords are written in lowercase letters.

Any statement or functions within comments are not executable and they are ignored by the compiler.

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About programming language C and C++

For the last couple of decades, the C programming language has been widely accepted for all applications, and are perhaps the most powerful of structured programming languages. In recent times, the object oriented programming (OOP) paradigm has become popular in modern software life cycles. Now, C++ has the status of a structured programming language with Object Oriented Programming (OOP) methodology, in which the software reusability, testability, maintainability, portability and reliability are the key features and requisites of modern software development.

Initially, the C++ programming language was considered as just an enhanced version of the C program with a few extra keywords. But it is not so. It is one of the well designed and widely accepted object oriented programming languages.

C++ has become quite popular due to the following reasons:

• ·     ·         It supports all features of both structured programming and object oriented programming.
• ·         It gives the easiest way to handle the data hiding and encapsulation with the help of powerful keyword such as class, private, public and protected.
• ·         Polymorphism through virtual function, virtual based classes and virtual destructors give the late binding of the compiler.
• ·         Inheritance, one of the most powerful design concepts is supported with single inheritance and multiple inheritance of base class and derived classes.
• ·         It provides overloading of operators and functions.
• ·         C++ focuses on function and class templates for heading parameterized data types.
• ·         Exception heading is done with the extra keyword , namely, try, catch and throw.
• ·         Provides friends, static methods, constructors destructors for the class objects.
•  

This blog has been organized in such a manner that new programmers will find easy to read and understand. I have assumed the reader has no prior knowledge of C++.

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