Phase 1: Problem Definition and Analysis

Write a program to compute a GPA.  
Inputs: grades & credits
Assume: standard point scale: A+, A = 4.0, A- = 3.7,
B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7,
D+ = 1.3, D = 1.0, F = 0.0
Output: grade point average

SAMPLE RUN:

Welcome to the GPA program
how many courses do you have? 4
for each course, enter letter grade and credits:
course 1: A 3.0  (course points = 4*3 = 12)
course 2: B- 4.0 (course points = 2.7*4 = 10.8)
course 3: C 2.5 (course points = 2*2.5 = 5)
course 4: B+ 3 (course points = 3.3*3 = 9.9)
(point total is 37.7)
(credit total is 12.5)
GPA is 3.016

Phase 2: Design Solution, pseudocode

- display welcome message
- set totalPoints to 0
- set totalCredits to 0
- ask for number of coursdes
- get and store numCourses
- display message asking for grades and credits
- set courseNum to 1
- repeat while courseNum <= numCourses (for each course)
  - display "course ", courseNum, ":"
  - get letterGrade (for this course)
  - get credits (for this course)
  - add 1 to courseNum
  - convert letterGrade to points (NEEDS MORE DETAIL)
  - multiply points by credits, store as coursePoints
  - add coursePoints to totalPoints
  - add credits to totalCredits
- set gpa to totalPoints / totalCredits
- display "GPA is ", gp