Python core programming version 2 Chapter 5 exercise continued 1-Python core programming answers-self-developed-

The answer here is not from official resources, but from my own exercises, which may be incorrect.

5-5.
Return the remainder. Take any amount less than $1 and calculate the minimum number of coins you can replace. There are four types of coins: 1 cent, 5 cent, 10 cent, and 25 cent. $1 equals 100 cents. For example, the calculation result of $0.76 is 3, 25, and 1, respectively. Similar to 76 items, 1 cent, 2 items, 25 cents, 2 items, 10 cents, 1 item, 5 cents, and 1 piece, the results do not meet the requirements.
[Answer]
The Code is as follows:
Def verify ():
B = '000000'
If len (a) = 2 and a [0] in B and a [1] in B: return True
Else: return False

Def change ():
N25 = int (a)/25
N10 = (int (a)-25 * N25)/10
N5 = (int (a)-25 * N25-10 * N10)/5
N1 = int (a)-25 * N25-10 * N10-5 * N5
Print '% I cents can be changed to:' % int ()
Print '25 Cents: % I '% N25
Print '10 Cents: % I '% N10
Print '5 Cents: % I '% N5
Print '1 Cents: % I '% N1

A = raw_input ("Please input the number in U. S cents :...")
If verify (a): change ()
Else: print "Invalid input, Please try again ."

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5-6.
Arithmetic. Write a calculator program. Your code can accept this expression. two operands are added with an operator N1 operator N2. Among them, N1 and N2 are integer or floating point type, and the operators can be +,-, *,/, % ,**, addition, subtraction, multiplication, integer division, remainder operation, and power operation. Calculate the result of this expression and display it. Tip: You can use the string method split (), but you cannot use the built-in function eval ().
[Answer]
The Code is as follows:
Print 'Please input the expression, such as 1 + 23 :...'
Expression = raw_input ()

Def verify ():
Try:
Float ()
Return True
Failed t ValueError:
Print 'you input an illegal expression. "% s" is not a number. '%
Return False

If len (expression. split ('+') = 2:
If (verify (expression. split ('+') [0]) and (verify (expression. split ('+') [1]):
Print '= % F' % (float (expression. split (' + ') [0]) + float (expression. split (' + ') [1])
Pass

Elif len (expression. split ('*') = 2:
If (verify (expression. split ('*') [0]) and (verify (expression. split ('*') [1]):
Print '= % F' % (float (expression. split (' * ') [0]) * float (expression. split (' * ') [1])
Pass

Elif len (expression. split ('/') = 2:
If (verify (expression. split ('/') [0]) and (verify (expression. split ('/') [1]):
Print '= % F' % (float (expression. split ('/') [0])/float (expression. split ('/') [1])
Pass

Elif len (expression. split ('%') = 2:
If (verify (expression. split ('%') [0]) and (verify (expression. split ('%') [1]):
Print '= % F' % (float (expression. split (' % ') [0]) % float (expression. split (' % ') [1])
Pass

Elif len (expression. split ('**') = 2:
If (verify (expression. split ('**') [0]) and (verify (expression. split ('**') [1]):
Print '= % F' % (float (expression. split ('**') [0]) ** float (expression. split ('**') [1])
Pass

Elif len (expression. split ('-') = 2:
If (verify (expression. split ('-') [0]) and (verify (expression. split ('-') [1]):
Print '= % F' % (float (expression. split ('-') [0])-float (expression. split ('-') [1])
Pass

Else:
Pass
[Unfinished] This program cannot calculate an expression such as 1-2.

5-7.
Business Tax. Take a commodity amount at will, and then calculate the business tax payable based on the local business tax quota.
[Answer]
The Code is as follows:
PurePrice = float (raw_input ('Please input the price :...'))
Print 'you should pay :'
Print 'subtotal: % 10.2f '% purePrice
Print 'sales Tax: % 10.2f '% round (purePrice * 0.11, 2)
Print 'total: % 10.2f '% (purePrice + round (purePrice * 0.11, 2 ))

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