Create Exercise-28-Max-Of-Three.py

Author: swsoyee

Exercise-28-Max-Of-Three.py

@@ -0,0 +1,52 @@
+'''
+Exercise 28: Max Of Three
+
+Implement a function that takes as input three variables, and
+returns the largest of the three. Do this without using the Python
+max() function!
+
+The goal of this exercise is to think about some internals that
+Python normally takes care of for us. All you need is some
+variables and if statements!
+
+'''
+
+# Solution
+def get_input():
+    """
+    Get the user input number, split by space.
+
+    Returns:
+    input_number -- a list contain all the numbers of user's input
+    """
+    input_number = input('Please type some numbers, split by space:').split()
+    try:
+        input_number = [float(i) for i in input_number]
+    except ValueError:
+        print('Input error')
+        input_number = []
+    return input_number
+
+def get_max(input_number):
+    """
+    Get the max value in input_numebr list.
+    
+    Arguments:
+    input_number -- a list contain all the numbers of user's input
+    
+    Returns:
+    max_value -- the max value in input_numebr list.
+    """
+    max = float('-inf')
+    for i in input_number:
+        max = i if i > max else max
+    if len(input_number) == 0:
+        max = 'Please check your input'
+    return max
+    
+def main():
+    input_number = get_input()
+    print(get_max(input_number))
+    
+if __name__ == "__main__":
+    main()