import streamlit as st

def main():
    st.title("Enhanced Calculator")

    num1 = st.number_input("Enter the first number:", format="%f")
    num2 = st.number_input("Enter the second number:", format="%f")

    operation = st.radio("Select an operation:", (
        "Addition (+)",
        "Subtraction (-)",
        "Multiplication (*)",
        "Division (/)",
        "Exponentiation (^)",
        "Modulus (%)",
        "Floor Division (//)"
    ))

    if st.button("Calculate"):
        try:
            if operation == "Addition (+)":
                result = num1 + num2
            elif operation == "Subtraction (-)":
                result = num1 - num2
            elif operation == "Multiplication (*)":
                result = num1 * num2
            elif operation == "Division (/)":
                result = num1 / num2
            elif operation == "Exponentiation (^)":
                result = num1 ** num2
            elif operation == "Modulus (%)":
                result = num1 % num2
            elif operation == "Floor Division (//)":
                result = num1 // num2
            st.success(f"Result: {result}")
        except ZeroDivisionError:
            st.error("Error: Division by zero is not allowed.")

if __name__ == "__main__":
    main()