Other Important Programs

a)C Program to Check Armstrong for 3 digit number

Source Code:

#include <stdio.h>

int main() {

    int num, originalNum, remainder, result = 0;

    printf("Enter a three-digit integer: ");

    scanf("%d", &num);

    originalNum = num;

    while (originalNum != 0) {

       remainder = originalNum % 10;

               result += remainder * remainder * remainder;

       originalNum /= 10;

    }

    if (result == num)

        printf("%d is an Armstrong number.", num);

    else

        printf("%d is not an Armstrong number.", num);

    return 0;

}

 OutPut:

Enter a three-digit integer: 371
371 is an Armstrong number.

b) C Program to Check Armstrong for any digit number

 Source Code:

#include <math.h>
#include <stdio.h>
int main() {
   int num, originalNum, remainder, n = 0;
   float result = 0.0;
   printf("Enter an integer: ");
   scanf("%d", &num);
   originalNum = num;
   for (originalNum = num; originalNum != 0; ++n) {
       originalNum /= 10;
   }
   for (originalNum = num; originalNum != 0; originalNum /= 10) {
       remainder = originalNum % 10;
        result += pow(remainder, n);
   }
   if ((int)result == num)
    printf("%d is an Armstrong number.", num);
   else
    printf("%d is not an Armstrong number.", num);
   return 0;
}

Output:

Enter an integer: 1634
1634 is an Armstrong number.

C) C Program for Tower of Hanoi Problem Using Recursion

 Source Code:

#include<stdio.h>

 

void TOH(int,char,char,char);

 

void main()

 

{

 

int n;

 

printf("How many plates?");

 

scanf("%d",&n);

 

TOH(n,'A','B','C');

}

 

void TOH(int n,char x,char y,char z)

 

{

 

if(n>0)

 

{

 

TOH(n-1,x,z,y);

 

printf("\n%c -> %c",x,y);

 

TOH(n-1,z,y,x);

 

}

 

}

 

Output:

How many plates?3

A -> B

A -> C

B -> C
A -> B

C -> A

C -> B

A -> B