Added ArmstrongNumber.c

README.md

@@ -73,19 +73,20 @@ C
 
 
 ## Misc
+	- ArmstrongNumber	
 	- Binning
 	- Factorial
 	- Fibonacci
+	- Greatest Common Divisor	
 	- isArmstrong
 	- LongestSubSequence
 	- palindrome
+	- prime factorization	
 	- QUARTILE
 	- rselect
 	- strongNumber
-	- TowerOfHanoi
-	- Greatest Common Divisor
 	- Sudoku Solver	
-	- prime factorization
+	- TowerOfHanoi	
 
 ## Project Euler
 	- Problem 1

misc/ArmstrongNumber.c

@@ -0,0 +1,64 @@
+//A number is called as Armstrong number if sum of cubes of digits of number is equal to the number itself.
+// For Example 153 is an Armstrong number because 153 = 1³+5³+3³.
+#include <stdio.h> 
+
+//Function to calculate x raised to the power y
+int power(int x, unsigned int y) 
+{ 
+	if (y == 0) 
+		return 1; 
+	if (y % 2 == 0) 
+		return power(x, y / 2) * power(x, y / 2); 
+	return x * power(x, y / 2) * power(x, y / 2); 
+} 
+
+//Function to calculate order of the number 
+int order(int x) 
+{ 
+	int n = 0; 
+	while (x) { 
+		n++; 
+		x = x / 10; 
+	} 
+	return n; 
+} 
+
+// Function to check whether the given number is 
+// Armstrong number or not 
+int isArmstrong(int x) 
+{ 
+	// Calling order function 
+	int n = order(x); 
+	int temp = x, sum = 0; 
+	while (temp)
+	{ 
+		int r = temp % 10; 
+		sum += power(r, n); 
+		temp = temp / 10; 
+	} 
+
+	// If satisfies Armstrong condition 
+	if (sum == x) 
+		return 1; 
+	else
+		return 0; 
+} 
+
+//
+int main() 
+{ 
+	int x = 153; 
+	if (isArmstrong(x) == 1) 
+		printf("True\n"); 
+	else
+		printf("False\n"); 
+
+	x = 1253; 
+	if (isArmstrong(x) == 1) 
+		printf("True\n"); 
+	else
+		printf("False\n"); 
+
+	return 0; 
+} 
+