First Summer 2008

Write a program (call it grade.py) that translates a number between 0 and 4 into the closest letter grade. For example, the number 2.8 (which might have been the average of several grades) would be converted to B-. Break ties in favor of the better grade; for example 2.85 should be a B.

Here's a sample run of such a program: Enter numeric score then press Enter : 3.85 A Enter numeric score then press Enter : 3.84 A- Enter numeric score then press Enter : 3.5 A- Enter numeric score then press Enter : 3.49 B+ Enter numeric score then press Enter : 3.1 B Enter numeric score then press Enter : 10 Number out of range: number too big. Enter numeric score then press Enter : -2 Number out of range: number too small. Enter numeric score then press Enter : -0.5 Number out of range: number too small.

The second program:

Write a program that

• reads three scores in the range [0, 100] from the user, then prints their average.
• If the average is above 90 the user is congratulated.
• Otherwise the user is not congratulated, (s)he is just told that the average is below 90.

State your assumptions in the code when you send it (more about this in class).