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CPP All : Number Varieties and Crunches
Concept Learning Code Sheets

Checking for Armstrong Number (3 Digit) #1539

Program takes integer input and finds if given number is an armstrong number

Armstrong number n digit #1573

Checking for armstrong number which can be even more than 3 digit.

Check if number is a palindrome #1575

To check if given number is same even if reversed (Palindrome).

Reversing an integer #1579

Printing a positive integer in reverse form. for e.g. printing 123 as 321.

Check for perfect number #1582

Check if the sum of all the divisors of a number brings the number itself.

All factors (divisors) of a number #1584

Printing all factors or divisors of an integer number.

Check for prime number (1 and n exclusion technique) #1587

Check if a number has only two factors 1 and the number itself. The 1 and n exclusion technique does not test division with these two obvious divisors and does it for all other possible divisors.

Extracting and printing the first and last digit of a number #2119

Using a loop technique and successive division by 10 to extract first and last digit of a given number and then printing it.

Finding GCD/HCF of two integer numbers #2871

Program to find Highest Common Factor (HCF), also called the Greatest Common Divisor between the two numbers entered by the user.

Finding LCM/SCM of two integer numbers #2874

Program to find the Least Common Multiple (LCM), also called the smallest common multiple between the two numbers entered by the user.

Check if Perfect Square #2884

A program to check if the given integer by the user is a perfect square of some integer number.

Check if Perfect Square (double to int conversion method) #2888

A program to check if the given integer by the user is a perfect square of some integer number by using the square root of double to int conversion and then comparison method.

Check if Triangular Number (successive summation method) #2892

Find if the given number is a triangular number by successive summation of natural numbers until it matches the given number.

Check if Triangular Number (perfect square testing – without sqrt) #2897

Find if the given number is a triangular number by finding if the 8*n+1 is a perfect square without using the sqrt function of the math library

Check if Triangular Number (perfect square testing – using rounded sqrt) #2900

Find if the given number is a triangular number by finding if the 8*n+1 is a perfect square by using the rounded square root.

Check if Triangular Number (perfect square testing – double to int) #2907

Find if the given number is a triangular number by finding if the 8*n+1 is a perfect square by using the double to int conversion.

Checking for buzz number #3176

Test if a number is divisible by 7 or the last digit is 7, means whether the number is a buzz number.

Find prime factors of a number #3218

Finding prime factors of a number input by the user.


Solved Problems

Palindrome numbers between 1 to 1000 #1553

Print all palindrome numbers between 1 to 1000.

Print all palindrome numbers between 1 to 1000.

Armstrong numbers between 1 to 999 #1566

Print all the armstrong numbers between 1 to 999.

Print all the armstrong numbers between 1 to 999.

Test palindrome for an integer number #3082

Write a program where a function of prototype int ispalin(int) is written, wh

Write a program where a function of prototype int ispalin(int) is written, which returns 1 when
given input number is a palindrome (eg. 121, 16561) else returns 0. Show implementation of this function in main routine by collecting a positive integer from the user.

function to reverse an integer #3086

Write a program to reverse the given integer number.using a separately called

Write a program to reverse the given integer number.using a separately called function to reverse the number.

Check if number is a palindrome without using modulus operator #3581

Write a C++ program to collect a positive integer from the user and the check

Write a C++ program to collect a positive integer from the user and the check its reversed number would be a palindrome or not (same number when reversed for e.g. 121, 1331). Please use some alternate technique to find remainder instead of modulus operator.

Error finding in function and related code #4447

Find syntactical errors in the following program and rewrite the program afte

Find syntactical errors in the following program and rewrite the program after underlining the corrected portion.

#include<iostreamh>
using namespace std;
void toUpper(char x) {return ((char) (x+1));}
main()
{
char c, String[]=”DOGS ARE NOT CATS”;
for(int i=0;String[i]!=;i++)
if(String[i]==’ ‘) cout<<endl;
else { c=toUpper(String[i]);cout<<c;}
return 0;
}


Code Sheets:18  Solved Problems:6 
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Introductory Sessions Beginning to Program Tokens Keyword and Identifiers Data Types Variables and Constants Operators Simple User Input Building Expressions and Formulas Simple Real World Problems Simple If and If Else Multiple-Nested-Ladder of If Else Switch case selection Simple Loops Tricks in Loops - break continue scope Loop Applications - Handling numerals Series printing loops Nested Loops Pattern printing loops Number Varieties and Crunches String Handling (Null Terminated) Strings - string class type Functions (Built-in) Functions - user defined Functions Reference Passing/Returning Arrays Concepts and 1-D Arrays Array Data Management Two dimensional arrays and Matrices Structures Basics Structures passing/returning 2D Array Memory Addressing Display Using IO Manipulation Display Using C Formatting Tricks User Defined Data Types Enumerated Types Preprocessor Directives And Macros Exception Handling Programming Paradigms and OOPs Advantages Abstraction and Encapsulation Polymorphism Inheritance Function Overloading Concepts Function Overloading Varieties Function Overloading Special Cases Defining Classes Creating and Using Class Objects Class Members Accessibility Class Function Types Inline Functions Constant Functions Nesting of Functions Class Members Scope Resolution Static Members in a Class Array of Objects Constructor Concepts Default Constructor Parameterized Constructor Copy Constructor Constructor Overloading Destructors Inheritance Fundamentals Public Derivations Private and Protected Derivations Multiple Inheritance Multi-Level Inheritance Class Nesting Data File Concepts Handling Text Files Handling Binary Files Pointer Concepts Pointer and Arrays Pointers and Functions Object Pointers This Pointer Linked Lists Stacks Queues


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