Another Example

Let's consider another, more direct example of a nested DO loop.

Suppose that you are to write a program to compute the average score for a set of students, each of whom has taken some number of examinations. Your program is to ask the user how many students there are and then, for each student,

• ask how many examinations the student has taken, and

• read in the correct number of examination scores, and

• compute the average score for that student, and

• print out the average.

How can we know that nested DO loops will be involved in this solution?

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What is a structure plan for this program?

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It is easy to see that this structure plan involves a nested loop.