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C Exercises: Check if a number is Authomorphic or not

C Numbers: Exercise-21 with Solution

Write a program in C to check if a number is Authomorphic or not.

Test Data
Input a number: 76

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 auno;
 printf("\n\n Check whether a number is an Authomorphic Number or not: \n");
 printf(" ------------------------------------------------------------\n");
 printf(" Input a number: ");
 scanf("%d",&auno);	
 
      if( chkAutomor(auno))
        printf(" The given number is an Automorphic Number.\n");
    else
        printf(" The given number is not an Authomorphic Number.\n");
    return 0;
}

Sample Output:

Input a number: 76                                                                                           
 The given number is an Automorphic Number.

Pictorial Presentation:

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

Flowchart:

Flowchart: Check if a number is Authomorphic or not

C Programming Code Editor:

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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