On 1/25/2019 6:56 AM, ^Bart wrote:
number1 = int( input("Insert the first number: "))
number2 = int( input("Insert the second number: "))
number3 = int( input("Insert the third number: "))
if number1 > number2 and number1 > number3:
print("Max number is: ",number1)
if number2 > number1 and number2 > number3:
print("Max number is: ",number2)
else:
print("Max number is: ",number3)
Try to insert numbers 3, 2 and 1 and the result will be number 3 and 1,
can you help me to fix it?
In my experience based on decades of writing programs...
1. The assignment/exercise/problem should be a write a function with a
particular signature. So first decide on the signature.
def max3(n1, n2, n3):
"Return the max of the three inputs."
return None # To be replaced.
2. The next thing to do is to WRITE A TEST. Any course that does not
pound this into your head is defective.
In this case, use the numbers 1, 2, 3. There are 6 permutations of 3
items, so list them explicitly. (For more than 3, up to some reasonable
limit, use itertools.permutations.)
trios = ((1,2,3), ..., (3,2,1)) # Replace ... with the other 4.
for trio in trios:
m = max3(*trio)
if m != 3:
print(f"Error: max3(*{m}) is {m}, not 3.")
print("Test done")
Note: after removing '...,' from trios, I followed my advice and tested
the above by running it, and caught a couple of typos and improved the
error message. Replacing 'None' and '...' is your job.
3. The test will initially fail 6 times. Good. Now edit the body of
max3 until there are none.
4. Worrying about external input comes last.
--
Terry Jan Reedy
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