Added week 6

week6/ex4.py

@@ -0,0 +1,24 @@
+from decimal import Decimal
+#引入decimal模块是因为python不是默认高精浮点数
+
+def main():
+    print('==Exercise 4==')
+
+    flag=True
+    while flag:
+        a = input("pls input a decimal:")
+        try: 
+            a = Decimal(a)
+            flag=False
+        except :
+            print("pls input a decimal!")
+    
+    d = a-int(a)
+
+    print(f"Decimal Part: {d if d else 'INTEGER'}")
+
+    print('==End Of Ex4==')
+    return 0
+
+if __name__ == '__main__':
+    main()