Write a C program (with meaningful comments) to solve a problem described in English. Create an IPO.

We want to count how many passing grades are entered. We dont know how many grades there will be. Use a sentinel controlled whileloop that will ask the user to enter student grades until a value of -1 is entered. Use a counter variable to count all the grades that are passing grades, where 70 is the minimum passing grade. If there are any grades that are out of the range 0 100, present an error message to the user, and do not count that grade as passing. We also would like to see what percentage of the valid grades are passing.

Create two more test cases.

Use following one in addition to the two you create.

Grades Entered: Expected Results

45

90

70

87

123 That is not a valid grade!

100

-1 You entered 4 passing grades.

80.0% of the valid grades entered are passing grades.