diff --git a/src/main/c/Calculator/calculator.c b/src/main/c/Calculator/calculator.c
index 6f0a91d..b6f0037 100644
--- a/src/main/c/Calculator/calculator.c
+++ b/src/main/c/Calculator/calculator.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <math.h>
 
 // Function prototypes
 void displayMenu();
@@ -23,8 +24,8 @@ double cube(double num);
 double cubeRoot(double num);
 
 int main() {
-    double choice, num1, num2, result, angle;
-    int r,n;
+    double num1, num2, result, angle;
+    int choice,r,n;
 
     do {
         displayMenu();
@@ -156,10 +157,10 @@ int main() {
                 printf("Invalid choice\n");
         }
                 }
-    } while (choice != 20);
+    while (choice != 20);
 
     return 0;
-}
+  }
 // Function definitions
 void displayMenu() {
     printf("\nAdvaced Calculator\n");