Programming for Everybody (Getting Started with Python) Assignment答案

This course aims to teach everyone the basics of programming computers using Python. We cover the basics of how one constructs a program from a series of simple instructions in Python. The course has no pre-requisites and avoids all but the simplest mathematics. Anyone with moderate computer experience should be able to master the materials in this course. This course will cover Chapters 1-5 of the textbook “Python for Everybody”. Once a student completes this course, they will be ready to take more advanced programming courses. This course covers Python 3.

2.2

Write a program that uses input to prompt a user for their name and then welcomes them. Note that input will pop up a dialog box. Enter Sarah in the pop-up box when you are prompted so your output will match the desired output.

name = input("Enter your name:")
print("Hello",name)

Desired Output

Hello Sarah

---

2.3

Write a program to prompt the user for hours and rate per hour using input to compute gross pay. Use 35 hours and a rate of 2.75 per hour to test the program (the pay should be 96.25). You should use input to read a string and float() to convert the string to a number. Do not worry about error checking or bad user data.

hrs = input("Enter Hours:")
hrs = float(hrs)
rate = input("Enter rate")
rate = float(rate)
pay = hrs * rate
print("Pay:",pay)

Desired Output

Pay: 96.25

---

 

3.1

Write a program to prompt the user for hours and rate per hour using input to compute gross pay. Pay the hourly rate for the hours up to 40 and 1.5 times the hourly rate for all hours worked above 40 hours. Use 45 hours and a rate of 10.50 per hour to test the program (the pay should be 498.75). You should use input to read a string and float() to convert the string to a number. Do not worry about error checking the user input - assume the user types numbers properly.

hrs = input("Enter Hours:")
rate = input("Enter Rate:")
h = float(hrs)
r = float(rate)

if h > 40:
    pay = 40*r+(h-40)*(r*1.5)
else:
    pay = h*r
    
print(pay)

Desired Output

498.75

---

 

3.3

Write a program to prompt for a score between 0.0 and 1.0. If the score is out of range, print an error. If the score is between 0.0 and 1.0, print a grade using the following table:

Score Grade

>= 0.9 A
>= 0.8 B
>= 0.7 C
>= 0.6 D
< 0.6 F
If the user enters a value out of range, print a suitable error message and exit. For the test, enter a score of 0.85.

score = input("Enter Score: ")
s= float(score)
if s >=0.0 and s <= 1.0:
    if s >= 0.9:
        print('A')
    elif s >= 0.8:
        print('B')
    elif s >= 0.7:
        print('C')    
    elif s >= 0.6:
        print('D')  
    elif s < 0.6:
        print('F')
else:
    print('Please enter a score between 0.0 and 1.0')
    quit()

Desired Output

B

---

 

 4.6 

Write a program to prompt the user for hours and rate per hour using input to compute gross pay. Pay should be the normal rate for hours up to 40 and time-and-a-half for the hourly rate for all hours worked above 40 hours. Put the logic to do the computation of pay in a function called computepay() and use the function to do the computation. The function should return a value. Use 45 hours and a rate of 10.50 per hour to test the program (the pay should be 498.75). You should use input to read a string and float() to convert the string to a number. Do not worry about error checking the user input unless you want to - you can assume the user types numbers properly. Do not name your variable sum or use the sum() function.

def computepay(h, r):
    if h <= 40 :
        fee = h * r
    elif h > 40 :
        fee = (h-40) * (1.5*r) + 40*r 
    return fee
 
hrs = input("Enter Hours: ")
rate = input("Enter Rate: ")
hrs = float(hrs)
rate = float(rate)
p = computepay(hrs, rate)
print("Pay", p)

Desired Output

Pay 498.75

---

 

5.2 

Write a program that repeatedly prompts a user for integer numbers until the user enters 'done'. Once 'done' is entered, print out the largest and smallest of the numbers. If the user enters anything other than a valid number catch it with a try/except and put out an appropriate message and ignore the number. Enter 7, 2, bob, 10, and 4 and match the output below.

largest = None
smallest = None
while True:
    num = input("Enter a number: ")
    if num == "done" :
        break
    try :
        num = int(num)
    except :
        print("Invalid input")
        continue
    if largest is None or num > largest :
        largest = num
    elif smallest is None or num < smallest:
        smallest = num
print("Maximum is", largest)
print("Minimum is", smallest)

Desired Output

Pay 498.75