using a for loop to initialize an array

I can't seem to figure this out. How can I use a for loop to accomplish the following?

Code:

---

classAverage[0] =
        (stuArray[0].grade[0] +
        stuArray[1].grade[0] +
        stuArray[2].grade[0] +
        stuArray[3].grade[0])/4;
        classAverage[1] =
        (stuArray[0].grade[1] +
        stuArray[1].grade[1] +
        stuArray[2].grade[1] +
        stuArray[3].grade[1])/4;
        classAverage[2] =
        (stuArray[0].grade[2] +
        stuArray[1].grade[2] +
        stuArray[2].grade[2] +
        stuArray[3].grade[2])/4;
        classAverage[3] =
        (stuArray[0].average +
        stuArray[1].average +
        stuArray[2].average +
        stuArray[3].average)/4;

---

You don't. You use two for loops (one for the slow-changing indices, one for the fast).

Quote:

---

Originally Posted by tabstop

You don't. You use two for loops (one for the slow-changing indices, one for the fast).

---

Ahh ha!! Thanks!!! This worked for me...

Code:

---

int i;
        int j;

        for (i = 0; i < sizeof(stuArray); i++)
        {
       
                for (j = 0; j < sizeof(stuArray); j++)
                       
                        (stuArray[i].grade[j] +
                        stuArray[i].grade[j] +
                        stuArray[i].grade[j] +
                        stuArray[i].average)/4;
        }

---

Really? I'm assuming you've left bits out, then, and changed some other bits.

Quote:

---

Originally Posted by tabstop

Really? I'm assuming you've left bits out, then, and changed some other bits.

---

LOL! I spoke too soon. I had forgot to comment out my old code. Uhhg!

I'm getting a syntax error saying "invalid operands to binary +"

Code:

---

      float classAverage[4];
        int i;
        int j;

        for (i = 0; i < sizeof(stuArray); i++)
        {
       
                for (j = 0; j < sizeof(stuArray); j++)
                {
                        classAverage = classAverage +
                        (stuArray[i].grade[j] +
                        stuArray[i].grade[j] +
                        stuArray[i].grade[j] +
                        stuArray[i].average)/4;
                }
        }

---

stuArray[i].average is what? (I'm guessing that's the + that's being complained about.)

Not that it matters, since it shouldn't be there in the first place, of course.

Quote:

---

Originally Posted by tabstop

stuArray[i].average is what? (I'm guessing that's the + that's being complained about.)

Not that it matters, since it shouldn't be there in the first place, of course.

---

it is supposed to average all the grades of each stuArray[i].grade.

Maybe the rest of the code would help clarify things.
http://www.box.net/shared/vtcg3h2mek

Okay, I think I'm getting closer. My instructor said not to use sizeof(stuArray). But that wasn't my only problem to begin with. I think my problem lies with accessing the average member of the stuArray.

Code:

---

void D_printClassAverage(student* stuArray)
{
        float classAverage[4];
#if 1
        int i;
        int j;

        for (i = 0; i < CSIZE; i++)
        {
       
                for (j = 0; j < CSIZE - 1; j++)
                {
                        classAverage[i] = classAverage[i] + ((stuArray[i].grade[j])/ CSIZE);
                }
                classAverage[i] = classAverage[i] + (stuArray[i].average)/CSIZE;
        }

---