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math logic using structures

Posted on 1998-12-13
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Last Modified: 2010-04-15
i am trying to write a function that will add all the interger values in an array with the integer values of other arrays, placing the total in its own variable all within the same structure.
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Question by:ronron10
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by:MatthewL
ID: 1255098
Hi ronron10;

I'm not sure if I understand the problem clearly.  Is this the structure you had in mind?
Or is there a second int array in the structure to hold the sums?

Matt
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by:MatthewL
ID: 1255099
Forgot to include the structure!

typedef struct      {      int numbers[20];
                  int size;
             } intArray;

Matt
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alexo earned 50 total points
ID: 1255100
   void AddArray(intArray* pTo, intArray* pFrom)
    {
        int i;
        assert(pTo->size == pFrom->size); /* see below */
        for (i = 0; i < pTo->size; ++i)
            pTo->numbers[i] += pFrom->numbers[i];
    }

If the arrays are not of the same size, the result is probably neaningless (unless I misunderstood the question).
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Author Comment

by:ronron10
ID: 1255101
struct students
{
      char name[25];
      int test[6];
      int assignment[10];
      int total_points;
      int final_exam;

}class_[25];
i'm trying to put the sum of test[], assignment[],and final_exam into total_points
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Expert Comment

by:ozo
ID: 1255102
Is this question a test, assignment, or final_exam?
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Expert Comment

by:RONSLOW
ID: 1255103
Is this what you mean (assuming you have an int i)

student.total_points = 0;
for (i = 0; i < 6; i++) {
  student.total_point += student.test[i];
}
for (i = 0; i < 10; i++) {
  student.total_point += student.assignment[i];
}
student.total_point += student.final_exam;

It's not really that hard... did you try it yourself first?

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by:ozo
ID: 1255104
Did you try it first RONSLOW?:)  Is this what you mean

class_[j].total_points = 0;

ronron10, if you can tell us what you tried, and what difficulties you had,
it may be easier for us to understand what help you need.
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Expert Comment

by:RONSLOW
ID: 1255105
just showed him how to accumulate a single student.  Don't want to do TOO much for him as it does seem like homework.  But if you want to be more specific...

for (j = 0; j < 25; j++) {
  class_[j].total_points = 0;
  for (i = 0; i < 6; i++) {
    class_[j].total_point += class_[j].test[i];
  }
  for (i = 0; i < 10; i++) {
    class_[j].total_point += class_[j].assignment[i];
  }
  class_[j].total_point += class_[j].final_exam;
}

this assumes you have int i,j;

Of course, you'd need to wrap this up into a function and pass a students[] array to it

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