C Exercises: Find the the Authomorphic numbers between 1 to 1000

Last update on May 27 2022 12:18:27 (UTC/GMT +8 hours)

C Numbers: Exercise-22 with Solution

Write a program in c++ to find the the Authomorphic numbers between 1 to 1000.

Sample Solution:

C Code:

# include <stdio.h>
# include <stdlib.h>
# include <stdbool.h>

bool chkAutomor(int num1)
{
    int sqno = num1 * num1;
    while (num1 > 0)
    {
        if (num1 % 10 != sqno % 10)
            return false;
        num1 /= 10;
        sqno /= 10;
    }
    return true;
}
int main()
{
    int i;
  printf("\n\n Find the the Authomorphic numbers between 1 to 1000 \n");
  printf(" -------------------------------------------------------\n");
  printf(" The Authomorphic numbers are: ");
	for(i=1;i<=1000;i++)
	{
      if( chkAutomor(i))
         printf("%d ",i);
	}
 printf("\n");
}

Sample Output:

 The Authomorphic numbers are: 1 5 6 25 76 376 625

Pictorial Presentation:

C programming: Check if a number is Authomorphic or not.

Flowchart:

C Programming Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a program in C to check if a number is Authomorphic or not.
Next: Write a program in C to check whether a number is a Duck Number or not.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP