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{
cout << Passing; // Student is passing
if (average < 70.0)
cout << but marginal; // But marginal
cout << . < endl;
}
else // Student is failing
cout << Failing. < endl;
}
else // Invalid data
cout << Invalid Data: Score(s) less than zero. < endl;
return 0;
} |
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Here's a sample run of the program. Again, the input is in color. |
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Enter a Student ID number and three test scores:
9483681 73 62 68
Student Number: 9483681 Test Scores: 73, 62, 68
Average score is 67.67--Passing but marginal. |
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And here's a sample run with invalid data: |
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Enter a Student ID number and three test scores:
9483681 73 -10 62
Student Number: 9483681 Test Scores: 73, -10, 62
Invalid Data: Score(s) less than zero. |
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In this program, we use a nested If structure that's easy to understand although somewhat inefficient. We assign a value to dataOK in one statement before testing it in the next. We could reduce the code by saying |
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dataOK = ! (test1 < 0 || test2 < 0 || test3 < 0); |
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Using DeMorgan's Law, we also could write this statement as |
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dataOK = (test1 >= 0 && test2 >= 0 && test3 >= 0); |
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In fact, we could reduce the code even more by eliminating the variable dataOK and using |
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