Curricular Resources > 1981 Volume VI > Unit 4 (81.06.04) > Section 10

Computing

CONTENTS OF CURRICULUM UNIT 81.06.04

Unit Guide

Introducing Computer Programming in a Traditional Classroom

Lauretta J. Fox

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Computer Program to Calculate the Area of a Triangle

Program 7 introduces the idea of using the computer for or programmed learning. The student will do the problems then use the computer to check his answers.

10 REM FIND THE AREA OF A TRIANGLE

20 INPUT B, H

25 IF B 0 THEN 90

30 LET A = B*H/2

31 PRINT “WHAT IS YOUR ANSWER?”

35 INPUT A1

40 IF A1=A THEN 70

50 PRINT “YOUR SOLUTION IS NOT CORRECT. “

51 PRINT “CALCULATE THE AREA AGAIN.”

52 PRINT “WHAT IS YOUR ANSWER THIS TIME? “

53 INPUT A2

54 IF A2 = A THEN 70

55 PRINT “YOUR ANSWER STILL IS NOT CORRECT.”

56 PRINT “ YOU MAY TRY IT ONE MORE TIME.”

57 PRINT “WHAT ANSWER DO YOU HAVE NOW? “

58 INPUT A3

59 IF A3 =A THEN 70

60 PRINT “YOUR ANSWER IS STILL WRONG. YOU WILL”

61 PRINT “NOT RECEIVE CREDIT FOR THIS PROBLEM.”

62 PRINT “GO ON TO THE NEXT PROBLEM.”

65 GO TO 20

70 PRINT “YOU ARE CORRECT. AREA=” A

71 PRINT “GO ON TO THE NEXT PROBLEM.’’

72 GO TO 20

90 END

Result: ? you type in the values of B and H.)

WHAT IS YOUR ANSWER?

? (Here you type in your answer)

YOU ARE CORRECT. AREA =

GO ON TO THE NEXT PROBLEM.

Or

YOUR SOLUTION IS NOT CORRECT.

CALCULATE THE AREA AGAIN.

WHAT IS YOUR ANSWER THIS TIME?

? (Here you type in your answer.)

YOU ARE CORRECT. AREA =

GO ON TO THE NEXT PROBLEM.

Or

YOUR ANSWER STILL IS NOT CORRECT.

YOU MAY TRY IT ONE MORE TIME.

WHAT ANSWER DO YOU HAVE NOW?

? (Here you type in your answer.)

YOU ARE CORRECT. AREA =

GO ON TO THE NEXT PROBLEM.

Or

YOUR ANSWER IS STILL WRONG. YOU WILL NOT RECEIVE CREDIT FOR THIS PROBLEM. GO ON TO THE NEXT PROBLEM.

Explanation of Program 7:

Line 20 causes the computer to stop and wait for the student to type in the values of the base and altitude of the triangle.

Line 25 indicates that the program is finished and should stop when a negative value is assigned to the base.

Line 30 provides the formula to find the area of the triangle.

Line 31 asks the student for his answer.

Line 35 causes the computer to wait until the student types in the answer that he has calculated to be the area of the triangle.

Lines 40 indicate that the student has obtained the right

70, 71 answer and may proceed to the next problem.

Line 72 reroutes the computer back to line 20 to obtain the values of the base and altitude of the next triangle.

Lines 50 tell the student to solve the problem again,

51 because his answer is wrong.

Line 52 asks the student for his second answer to the problem.

Line 53 causes the computer to wait until the student types in the answer that he has just found.

Lines 55 tell the student that his answer is still wrong,

56 but he may have one more chance to solve the problem correctly.

Line 57 asks for the answer obtained on the third try.

Lines 60 tell the student that his answer is wrong,

61, 62 credit will be given for the problem. He may not try again, but should Line 63 reroutes the computer back to line 20 to obtain the values and altitude of the next triangle.

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Program 7	introduces the idea of using the computer for or programmed learning. The student will do the problems then use the computer to check his answers.
	10 REM FIND THE AREA OF A TRIANGLE
	20 INPUT B, H
	25 IF B 0 THEN 90
	30 LET A = B*H/2
	31 PRINT “WHAT IS YOUR ANSWER?”
	35 INPUT A1
	40 IF A1=A THEN 70
	50 PRINT “YOUR SOLUTION IS NOT CORRECT. “
	51 PRINT “CALCULATE THE AREA AGAIN.”
	52 PRINT “WHAT IS YOUR ANSWER THIS TIME? “
	53 INPUT A2
	54 IF A2 = A THEN 70
	55 PRINT “YOUR ANSWER STILL IS NOT CORRECT.”
	56 PRINT “ YOU MAY TRY IT ONE MORE TIME.”
	57 PRINT “WHAT ANSWER DO YOU HAVE NOW? “
	58 INPUT A3
	59 IF A3 =A THEN 70
	60 PRINT “YOUR ANSWER IS STILL WRONG. YOU WILL”
	61 PRINT “NOT RECEIVE CREDIT FOR THIS PROBLEM.”
	62 PRINT “GO ON TO THE NEXT PROBLEM.”
	65 GO TO 20
	70 PRINT “YOU ARE CORRECT. AREA=” A
	71 PRINT “GO ON TO THE NEXT PROBLEM.’’
	72 GO TO 20
	90 END
Result:	? you type in the values of B and H.)
	WHAT IS YOUR ANSWER?
	? (Here you type in your answer)
	YOU ARE CORRECT. AREA =
	GO ON TO THE NEXT PROBLEM.
		Or
	YOUR SOLUTION IS NOT CORRECT.
	CALCULATE THE AREA AGAIN.
	WHAT IS YOUR ANSWER THIS TIME?
	? (Here you type in your answer.)
	YOU ARE CORRECT. AREA =
	GO ON TO THE NEXT PROBLEM.
		Or
	YOUR ANSWER STILL IS NOT CORRECT.
	YOU MAY TRY IT ONE MORE TIME.
	WHAT ANSWER DO YOU HAVE NOW?
	? (Here you type in your answer.)
	YOU ARE CORRECT. AREA =
	GO ON TO THE NEXT PROBLEM.
		Or
	YOUR ANSWER IS STILL WRONG. YOU WILL NOT RECEIVE CREDIT FOR THIS PROBLEM. GO ON TO THE NEXT PROBLEM.

Line 20	causes the computer to stop and wait for the student to type in the values of the base and altitude of the triangle.
Line 25	indicates that the program is finished and should stop when a negative value is assigned to the base.
Line 30	provides the formula to find the area of the triangle.
Line 31	asks the student for his answer.
Line 35	causes the computer to wait until the student types in the answer that he has calculated to be the area of the triangle.
Lines 40	indicate that the student has obtained the right
70, 71	answer and may proceed to the next problem.
Line 72	reroutes the computer back to line 20 to obtain the values of the base and altitude of the next triangle.
Lines 50	tell the student to solve the problem again,
51	because his answer is wrong.
Line 52	asks the student for his second answer to the problem.
Line 53	causes the computer to wait until the student types in the answer that he has just found.
Lines 55	tell the student that his answer is still wrong,
56	but he may have one more chance to solve the problem correctly.
Line 57	asks for the answer obtained on the third try.
Lines 60	tell the student that his answer is wrong,
61, 62	credit will be given for the problem. He may not try again, but should Line 63 reroutes the computer back to line 20 to obtain the values and altitude of the next triangle.