added armstrong number checker in c

C/armstrongNumber.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <math.h>
+
+int isArmstrong(int number) {
+    int originalNum, remainder, result = 0, n = 0;
+
+    originalNum = number;
+
+    while (originalNum != 0) {
+        originalNum /= 10;
+        ++n;
+    }
+
+    originalNum = number;
+
+    while (originalNum != 0) {
+        remainder = originalNum % 10;
+        result += pow(remainder, n);
+        originalNum /= 10;
+    }
+
+    return (result == number);
+}
+
+int main() {
+    int number;
+
+    printf("Enter an integer: ");
+    scanf("%d", &number);
+
+    if (isArmstrong(number))
+        printf("%d is an Armstrong number.\n", number);
+    else
+        printf("%d is not an Armstrong number.\n", number);
+
+    return 0;
+}