Step 1: Start
Step 2: Declare variables a,b and c.
Step 3: Read variables a,b and c.
Step 4: If a>b
           If a>c
              Display a is the largest number.
           Else
              Display c is the largest number.
        Else
           If b>c
              Display b is the largest number.
           Else
              Display c is the greatest number.  
Step 5: Stop

Step 1: Start
Step 2: Declare variables n,i,flag.
Step 3: Initialize variables
        flag←1
        i←2  
Step 4: Read n from user.
Step 5: Repeat the steps until i<(n/2)
     5.1 If remainder of n÷i equals 0
            flag←0
            Go to step 6
     5.2 i←i+1
Step 6: If flag=0
           Display n is not prime
        else
           Display n is prime
Step 7: Stop 

#include<iostream.h>
#include<conio.h>
void main()
{
 clrscr();
 int num,i,count=0;
 cout<<"Enter a number:";
 cin>>num;
 for(i=2;i<num;i++)
 {
  if(num%i==0)
  {
   count++;
   break;
  }
 }
 if(count==0)
 {
  cout<<"This is a prime number";
 }
 else
 {
  cout<<"This is not a prime number";
 }
 getch();
}

 

Output:

Above C++ Programming Example Output (for not prime number):

Fibonacci Series Program in C++:

 algorithm to print the Fibonacci series.

Step 1: Start 
Step 2: Declare variables first_term,second_term and temp. 
Step 3: Initialize variables first_term←0 second_term←1 
Step 4: Display first_term and second_term 
Step 5: Repeat the steps until second_term≤given number
     5.1: temp←second_term 
     5.2: second_term←second_term+first term 
     5.3: first_term←temp 
     5.4: Display second_term 
Step 6: Stop

Program:

#include<iostream.h> #include<conio.h> void main() { int i,no, first=0, second=1, next; clrscr(); first=0; second=1; cout<<"Enter nubmer of terms for Series: "; cin>>no; cout<<"Fibonacci series are: \n"; for(i=0; i<no; i++) { cout<<"\n"<<first; next = first + second; first = second; second = next; } getch(); }

Output

Enter nubmer of terms for Series: 7
Fibonacci series are:
0
1
1
2
3
5
8

Factorial of given number:

Algorithm to find the factorial of a number entered by user.

Step 1: Start
Step 2: Declare variables n,factorial and i.
Step 3: Initialize variables
          factorial←1
          i←1
Step 4: Read value of n
Step 5: Repeat the steps until i=n
     5.1: factorial←factorial*i
     5.2: i←i+1
Step 6: Display factorial
Step 7: Stop

Factorial Program in C++

#include<iostream.h>
#include<conio.h>

void main()
{
int i, no, fact=1;
clrscr();
cout<<"Enter the any no. : ";
cin>>no;
for(i=1;i<=no;i++)
{
fact=fact*i;
}
cout<<"Factorial: "<<fact;
getch();
}

Output

Enter the any no. : 4
Factorial: 24