py4inf_ch3

## ex. 3.1 and ex. 3.2

## Rewrite your pay computation to give the employee 1.5 times the hourly rate for hours worked above 40 hours.
## Enter Hours: 45
## Enter Rate: 10
## Pay: 475.0

## Rewrite your pay program using try and except so that your program handles non-numeric input gracefully by printing a message and exiting the program.         The following
## The following shows two executions of the program:
## Enter Hours: 20
## Enter Rate: nine
## Error, please enter numeric input
## Enter Hours: forty
## Error, please enter numeric input


hours = raw_input('Enter hours \n')
while hours.isdigit()==False:
    hours = raw_input('Please enter a number for hours \n')
rate = 2.75
hours = float(hours)
if hours <=40:
    pay = hours*rate
else: pay = (40*2.75)+(hours-40)*rate*1.5
print "Pay ", round(pay,2)


## ex. 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

score = raw_input ('Please give a score \n')
while score.isalpha () == True or float(score)>1.0:
    score = raw_input ('Please input a number between 0.0 and 1.0 for the score \n')

score=round(float(score),2)
if score >= 0.9:
    print 'A'
elif score >=0.8:
    print 'B'
elif score >=0.7:
    print 'C'
elif score >=0.6:
    print 'D'
else: print 'F'