''' Purpose: relate a cautionary tale -- make sure your expressions do
        what they are supposed to do
'''

# get Celsius temperature c

reply = input( 'Enter Celsius temperature: ' )  # ALWAYS hands back a STRING!!!

c = int( reply )  # convert our string number into an int

print( )

# formula for f = 9/5 c + 32

# python uses PMDAS (power, multiplication-division, addition-subtraction); left to right

# compute respectively, f1 and f2, the decimal and integer Fahrenheit equivalents of c 

# remember that a single / is decimal division --> gives you decimal answer
f1 = 9/5 * c + 32
f1 = round( f1, 1 )  # we can simplify the number of decimal places to 1 decimal
# the second argument is the number of decimal places you want to round to - this is optional
# if not given, it'll just round to the nearest integer

# translating algebra to programming can be different

# cannot have implicit multiplication, MUST USE * to indicate multiplication
# 3c --> not ok
# 3 * c --> ok

# want integer answer --> we can do integer division with //
# but why does 9//5 give you the wrong answer?
# 9//5 --> 1 because it drops the decimal
# --> 1 * c + 32 = 1 * (24) + 32 = 56 which is not the same as 75.2 F
# must be aware about operators and their orders within the formula so that we get the same answer
f2 = 9//5 * c + 32
# when you drop the decimals, calculations might be a lot different when involving multiplication or division

# f2 = 9 * c // 5 + 32
# make the numerator of division as large as possible before you do division --> gives you a more accurate answer

# the problem doesn't tell us how to round, so either int() or round() would be fine in this case
# can also use int()
f2 = int( f1 ) # we have the decimal version in f1, then to just find the integer version, we use int() to drop the decimal places

# use round()
f2 = round( f1 )  # round to the nearest integer from the answer in f1
# we didn't give the round() function a second argument, so it rounds to the nearest integer --> so f2 is an int

# display results

print( c, 'C =', f1, 'F' )

print( )

print( c, 'C =', f2, 'F' )