Thread: for loops

I'm having trouble incorporating this for loop:

Code:

	double sum; 
	for (int row= 0; row < i; row ++)
	{
		cout << Names[row] << "    ";
		int col=0;
		for (col= 0; col < num; col ++)
			cout << Scores[row][col] << "   ";
		cout << "\n";
	}

Into this one:

Code:

cout << fixed << showpoint << setprecision (2);
	for (int row =0; row < i; row++) //For each student, calculate the average score. Average for each row.
	{
		sum= 0;
		for (int col =0; col < num; col++)
			sum= sum + Scores[row][col];

		AvgStudentScore[row]= (float) sum/num;
	
		if (AvgStudentScore [row] > 90)
			Grade[row]= 'A';

		else if (AvgStudentScore [row] > 80)
			Grade[row]= 'B';

		else if (AvgStudentScore [row] > 67.5) 
			Grade[row]= 'C';

		else if (AvgStudentScore [row] > 55)
			Grade[row]= 'D';

		else 
			Grade[row]= 'F';

		cout << "* " << AvgStudentScore[row] << "   " << Grade[row] << "\n";
	}

I tried this:

Code:

double sum; 
	cout << fixed << showpoint << setprecision (2);
	for (int row= 0; row < i; row ++)
	{
		cout << Names[row] << "    ";
		sum=0;
		int col=0;
		for (col= 0; col < num; col ++)
			cout << Scores[row][col] << "   ";
		sum= sum + Scores[row][col];
		cout << "\n";
		AvgStudentScore[row]= (float) sum/num;

		if (AvgStudentScore [row] > 90)
			Grade[row]= 'A';

		else if (AvgStudentScore [row] > 80)
			Grade[row]= 'B';

		else if (AvgStudentScore [row] > 67.5) 
			Grade[row]= 'C';

		else if (AvgStudentScore [row] > 55)
			Grade[row]= 'D';

		else 
			Grade[row]= 'F';

		cout << "* " << AvgStudentScore[row] << "   " << Grade[row] << "\n";
	}

But the final code does not give me the results I am looking for. The average given by the last code is very very strange. Note, that when I have both for loops (first two loops) I do get the correct results (average), however, the results do not show up where they are supposed to be, which is, next to other data that I have in my program.

Any ideas anyone?

Are you saying I still need to use all for loops even after merging?

Consider the line

Code:

sum= sum + Scores[row][col];

Before: in a for loop. After: not in a for loop. There's nothing wrong with merging (in fact I would recommend that you do so), but you can't change things.

Great! Thanks for pointing that out. I was in fact missing the sum formula inside the for loop and needed curly braces for that as well.