Update app.py

app.py

@@ -4,76 +4,87 @@ import math
 st.set_page_config(page_title="Advanced Calculator", page_icon="🧮")
 
 st.title("🧮 Advanced Calculator")
-st.write("Built with Streamlit for Hugging Face Spaces 🚀")
-
-# Initialize history
-if "history" not in st.session_state:
-    st.session_state.history = []
-
-operation = st.selectbox(
-    "Choose an operation",
-    [
-        "Addition",
-        "Subtraction",
-        "Multiplication",
-        "Division",
-        "Power",
-        "Modulus",
-        "Square Root",
-        "Sin",
-        "Cos",
-        "Tan",
-    ],
+st.caption("Streamlit App for Hugging Face Spaces")
+
+# Initialize expression
+if "expression" not in st.session_state:
+    st.session_state.expression = ""
+
+# Display
+st.text_input(
+    "Calculator",
+    st.session_state.expression,
+    disabled=True,
 )
 
-def calculate(op, a=None, b=None):
-    if op == "Addition":
-        return a + b
-    elif op == "Subtraction":
-        return a - b
-    elif op == "Multiplication":
-        return a * b
-    elif op == "Division":
-        if b == 0:
-            return "❌ Division by zero"
-        return a / b
-    elif op == "Power":
-        return a ** b
-    elif op == "Modulus":
-        return a % b
-    elif op == "Square Root":
-        if a < 0:
-            return "❌ Negative number"
-        return math.sqrt(a)
-    elif op == "Sin":
-        return math.sin(math.radians(a))
-    elif op == "Cos":
-        return math.cos(math.radians(a))
-    elif op == "Tan":
-        return math.tan(math.radians(a))
-
-# Input fields
-if operation in ["Square Root", "Sin", "Cos", "Tan"]:
-    num1 = st.number_input("Enter number / angle (degrees)", value=0.0)
-    if st.button("Calculate"):
-        result = calculate(operation, num1)
-        st.success(f"Result: {result}")
-        st.session_state.history.append(f"{operation}({num1}) = {result}")
-else:
-    num1 = st.number_input("Enter first number", value=0.0)
-    num2 = st.number_input("Enter second number", value=0.0)
-    if st.button("Calculate"):
-        result = calculate(operation, num1, num2)
-        st.success(f"Result: {result}")
-        st.session_state.history.append(
-            f"{operation}({num1}, {num2}) = {result}"
-        )
+# Button handler
+def press(key):
+    st.session_state.expression += str(key)
+
+def clear():
+    st.session_state.expression = ""
+
+def calculate():
+    try:
+        result = eval(st.session_state.expression)
+        st.session_state.expression = str(result)
+    except:
+        st.session_state.expression = "Error"
+
+# Layout
+buttons = [
+    ["7", "8", "9", "/"],
+    ["4", "5", "6", "*"],
+    ["1", "2", "3", "-"],
+    ["0", ".", "+", "="],
+]
+
+for row in buttons:
+    cols = st.columns(4)
+    for i, btn in enumerate(row):
+        if cols[i].button(btn):
+            if btn == "=":
+                calculate()
+            else:
+                press(btn)
+
+# Extra controls
+col1, col2 = st.columns(2)
+if col1.button("C"):
+    clear()
+
+if col2.button("√"):
+    try:
+        value = float(st.session_state.expression)
+        st.session_state.expression = str(math.sqrt(value))
+    except:
+        st.session_state.expression = "Error"
 
 st.markdown("---")
-st.subheader("📜 Calculation History")
 
-if st.session_state.history:
-    for item in reversed(st.session_state.history):
-        st.write(item)
-else:
-    st.write("No calculations yet.")
+# Scientific buttons
+st.subheader("Scientific Functions")
+
+sci_cols = st.columns(3)
+
+if sci_cols[0].button("sin"):
+    try:
+        value = float(st.session_state.expression)
+        st.session_state.expression = str(math.sin(math.radians(value)))
+    except:
+        st.session_state.expression = "Error"
+
+if sci_cols[1].button("cos"):
+    try:
+        value = float(st.session_state.expression)
+        st.session_state.expression = str(math.cos(math.radians(value)))
+    except:
+        st.session_state.expression = "Error"
+
+if sci_cols[2].button("tan"):
+    try:
+        value = float(st.session_state.expression)
+        st.session_state.expression = str(math.tan(math.radians(value)))
+    except:
+        st.session_state.expression = "Error"
+