migration from cloud service

week4/ex3.py

@@ -0,0 +1,26 @@
+def main():
+    print('==Exercise 3==')
+    flag=True
+    while flag:
+        a = input("pls input first side length:")
+        try: 
+            a = float(a)
+            flag=False
+        except :
+            print("pls input a float!")
+    flag=True
+    while flag:
+        b = input("pls input another side length:")
+        try: 
+            b = float(b)
+            flag=False
+        except :
+            print("pls input a float!")
+
+    print(f"The lenth of the hypotenuse= {sum([i**2 for i in [a,b]])**0.5}")
+
+    print('==End Of Ex3==')
+    return 0
+
+if __name__ == '__main__':
+    main()