how to rewrite

[baketballcourt]

(int i = 1; i <= 7; i++)

how do i write the function above differently?

[eklavya sharma 2]

What you have written above is not a function
http://www.cplusplus.com/doc/tutorial/functions/

But it strongly looks like something which follows for

(int i=1;i<8;++i)

[baketballcourt]

right i have

void readTestScores(double & exam, double &tavge)
{
	double score, total = 0;
	cout << "ENTER EXAM SCORE\t:  ";
	cin >> exam;
	cout << "ENTER ALL TEST SCORES\t:  ";
	for (int i = 1; i <= 7; i++)
	{
		cin >> score;
		total += score;
	}
	tavge = (total / 7);

but is their another way i can write the for(int...)?

[baketballcourt]

i dont know what the i's stand for and i was hoping i could put something else in their place

[MikeyBoy]

i is just a counter for the loop. The for statement means the loop will execute 7 times. It's a perfectly good way of performing a repeated action. Why do you want to change it?

for statements are one of the absolutely fundamental building blocks of C/C++ coding. If you're going be working with code at all, I strongly recommend you go back to your tutorial sources and learn about them.

[baketballcourt]

thanks you

[MikeyBoy]

You're welcome.

I'm still curious as to why you want to change it.

[mutexe]

maybe a homework question to use a while or do/while loop instead?

[baketballcourt]

my teacher didnt go over i's so i replaced the i's with count and it worked

[MikeyBoy]

my teacher didnt go over i's so i replaced the i's with count and it worked

Is this a delayed April Fool's joke? Is it still April 1 somewhere in the world?

i is just the name of the variable. It's not a thing you have to learn about.

[Zaita]

Count down instead of up (this can also be slightly quicker too)

[DeXecipher]

that is not a function. If its a for loop you just write the enclosed statement 7 times. I'm not going to do it since it looks like a homework problem.

[SamuelAdams]

for (int i = 1; i <= 7; i++)

Here is what it does. For a better description you should be able to google any part you dont understand.

int acounter = 1; // a counter starting with 1
while ( acounter < = 7) // while loop, while counter is less than some value
{
Run below code
acounter++; // add 1 to acounter
}

[LB]

Zaita wrote:

Count down instead of up (this can also be slightly quicker too)

What is your reasoning for this? I don't see how it could be any quicker since addition and subtraction take the same amount of time and you are still going through the same iterations, just in a different order. Grated, there might be rare cases where it is faster due to branch prediction, but the same is just as likely for increasing.

[Cubbi]

On particularly non-optimizing compilers on early x86 platforms, counting down was 1-2 CPU instructions shorter than counting up. It's irrelevant today, of course.

[Zaita]

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0205j/CJAJACCH.html

http://en.wikipedia.org/wiki/Loop_optimization#Optimization_via_a_sequence_of_loop_transformations

:) I actually found loops counting down will still be slightly faster even with modern compilers, but I work on high speed computing where 1 second of time saved per iteration equates to about 11 days saved real time.