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Merge Sort in C++

  Merge Sort in C++ Introduction Merge Sort is a popular sorting algorithm that follows the Divide and Conquer approach. It divides an array into smaller subarrays, recursively sorts those subarrays, and finally merges the sorted subarrays to produce a completely sorted array. In this tutorial, we will learn how to implement Merge Sort in C++ . The program divides the array into two halves using the mid index, recursively sorts both halves, and then combines them using the merge() function. Merge Sort has a time complexity of O(n log n) in the best, average, and worst cases. Table of Contents Algorithm C++ Program Input Sample Output Output Explanation Dry Run Flow of Execution Time Complexity Space Complexity Applications Key Points Interview Questions Frequently Asked Questions Keywords Conclusion Algorithm Start the program. Read the size of the array. Read the array elements from the user. Call the mer...
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Write a program to check whether character is Upper Case, Lower Case or Digit

 Description : 

You have to read a characer and check it is  upper case, lower case, digit or none.of.above.

Sample Execution : 

Test case 1 : 

Enter the character : A

The character is Upper Case.

Test case 2 :

Enter the character : 5

The character is Digit.

Test case 3 :

Enter the character : !

The character not an alphabet or digit.

PROGRAM:

-------------------------------------------------------------------------------------------------------

#include<stdio.h>

int main()

{

    char ch;

  printf("Enter a character or digit;");

    scanf("%c",&ch);

     if(ch>='A' && ch<='Z')

   { printf("%c The character is Upper Case",ch );}

    else if(ch>='a' && ch<='z')

  {

       printf("%c The character is Lower Case",ch);

   }

   else if (ch>='0' && ch<='9')

   {

       printf("The character is Digit.");

   }

   else

   {

       printf("The character  not an  alphabet or digit.");

   }

   }

-----------------------------------------------------------------------------------------------------------

sampleoutput;Enter a character:A

sampleinput;The character is Upper case.



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