diff --git a/main.py b/main.py
index 0d3b2c7..0507578 100644
--- a/main.py
+++ b/main.py
@@ -1,9 +1,14 @@
-from misc.parser import *
-from misc.tokenizer import *
+from misc.window import *
 
-while True:
-    calcul = str(input("Entrez votre calcul en NPI : "))
-    tokens = tokenize(calcul)
-    npi = shutting_yard(tokens)
-    expression = npi2tree(npi)
-    print(expression.evalue())
\ No newline at end of file
+app = Window()
+app.mainloop()
+
+#from misc.parser import *
+#from misc.tokenizer import *
+
+#while True:
+#    calcul = str(input("Entrez votre calcul en NPI : "))
+#    tokens = tokenize(calcul)
+#    npi = shutting_yard(tokens)
+#    expression = npi2tree(npi)
+#    print(expression.evalue())
\ No newline at end of file
diff --git a/misc/window.py b/misc/window.py
new file mode 100644
index 0000000..e7108f9
--- /dev/null
+++ b/misc/window.py
@@ -0,0 +1,60 @@
+from tkinter import Tk, Button, Label, StringVar
+from misc.parser import *
+from misc.tokenizer import *
+
+class Window(Tk):
+
+    def __init__(self):
+        Tk.__init__(self)
+        self.title("test")
+        self.geometry("400x500")
+        self.resizable(False, False)
+
+        self.layout()
+
+    def layout(self):
+        #TEXT
+        self.text = StringVar(value="")
+        self.label = Label(textvariable=self.text, background="#eaeaea", borderwidth=2, relief="solid", font=("Arial", 20))
+        self.label.pack(fill="x")#.place(x=0, y=0)
+
+        #BOUTTONS
+        bouttons = ["1", "2", "3", "+", "-", "4", "5", "6", "*", "/", "7", "8", "9", "^", "sqrt", "EVAL", "0", "DEL", "CLEAR", "exp", "(", ")", ".", "sin", "cos"]
+        col = 0
+        row = 0
+        for b in bouttons:
+            if col == 5:
+                col = 0
+                row += 1
+
+            cmd = None
+            if b == "EVAL":
+                cmd = self.evalue
+            elif b == "DEL":
+                cmd = self.delete
+            elif b == "CLEAR":
+                cmd = self.clear
+            else:
+                cmd = lambda text = b: self.write(str(text))
+
+            Button(self, text=b, width=5, height=1, command=cmd).place(x=40+50*col, y=250+30*row)
+
+            col += 1
+    
+    def write(self, text):
+        current = self.text.get()
+        self.text.set(current + text)
+
+    def delete(self):
+        current = self.text.get()
+        self.text.set(current[:-1])
+
+    def clear(self):
+        self.text.set("")
+    
+    def evalue(self):
+        try:
+            exp = npi2tree(shutting_yard(tokenize(self.text.get())))
+            self.text.set(exp.evalue())
+        except:
+            self.text.set("Erreur")