diff --git a/src/main/c/Calculator/calculator.c b/src/main/c/Calculator/calculator.c
index 5ea7709..2a41295 100644
--- a/src/main/c/Calculator/calculator.c
+++ b/src/main/c/Calculator/calculator.c
@@ -54,3 +54,12 @@ switch (choice) {
 
     return 0;
 }
+// Function definitions
+void displayMenu() {
+    printf("\nSimple Calculator\n");
+    printf("1. Add\n");
+    printf("2. Subtract\n");
+    printf("3. Multiply\n");
+    printf("4. Divide\n");
+    printf("5. Exit\n");
+}
\ No newline at end of file