Loops

[Bolong Yu]

What is wrong with this?

#include <iostream>
using namespace std;

int main()
{

	int a;
	int sum = 0;
	int average;
	int count=-1;
	cout << "There is one variable, a."<< endl;
	
	do
	{
		cout << "What is the value of a?" << endl;
		cin >> a;
		;
			
		count = count ++;
	;
	}
	while (a != 0);
	if (a = 0)
		sum = sum + a;
	average = sum/count;
	cout << average << endl;
	cout << "You have entered " << count << " numbers." << endl;
	cout << "The sum of the numbers you have entered is " << sum <<" ." <<endl;
	
	cout << "The average of all the numbers are " << average 
		<< " ." << endl;
	return 0;

}

[LB]

There are a large quantity of problems with your code, but the most pressig matter is line 23. That is not the equality comparison operator, that is the copy assignment operator.

[Bolong Yu]

I changed it to == but it is still not orking.

[lixtary]

i think you should also put the sentence "sum = sum + a;" under the "count = count ++;" in the block .

[LB]

Line 19 is undefined behavior. It most likely does nothing. Change it to just say "++count;" and nothing more.

[greenleaf800073]

Compare and Contrast my program and yours. Analyze my program and maybe you'll learn something.

#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

int main(int nNumberofArgs,char* pszArgs[])
{
    int a[256];
	int sum = 0;
	int average = 0;
	int size;
	int counter = 0;
	int counter2 = 0;

	cout << "What is data set size?: ";
	cin >> size;
	cout << endl;

	for(;counter2 < size;)
	{
        cout << "Next number: ";
        cin >> counter;
        a[counter2] = counter;
        sum += counter;
        cout << endl;
        counter2++;

	}

	average = sum / counter2;
	cout << "You have entered " << counter2 << " numbers." << endl;
	cout << "The sum of the numbers you have entered is " << sum <<" ." <<endl;
    cout << "The average of all the numbers are " << average << " ." << endl;

    system("PAUSE");
	return 0;

}

[LB]

Frankly, I think the original program was better...

[greenleaf800073]

...Explain

[mirec]

I like first program better too.. i don t want to judge because I am just a begginer too but why is in greenleaf program line 23. I don t think that it is necessery to be there and than you don t need line 8 neither. and all you need to include is iostream. I am sorry if I am wrong but that s what I see.

and in the bolong s program well everything what s need to be said was already said.
line 19 = count = count ++ ->change to count++; like LB said
line 20 and 17 = no need;
line 23 = a has to be == to 0 like LB said
line 24 = after line 19 (maybe change to sum += a;) like lixtary said

[greenleaf800073]

But it works....I guess I got to addicted to arrays...

[mirec]

that s fine.. actually that s better then me. i have some problems with arrays. and yes it works fine. :)

[ihq4izwU]

I'm really sorry if I didn't make my code clearer but I just want to make sure that the author who posted this problem can understand it better.

Anyways just try compiling it. =)

#include <iostream>
using namespace std;

int main()
{
	int a;
	int sum = 0;
	int average;
	int count=-1;
	cout << "There is one variable, a."<< endl;
	
	do
	{
		cout << "What is the value of a?" << endl;
		cin >> a;
		sum = sum + a;
		count = count + 1;
	}
	while (a != 0);
	
	average = sum/count;
	cout << "\nYou have entered " << count << " numbers." << endl;
	cout << "The sum of the numbers you have entered is " << sum <<" ." <<endl;
	cout << "The average of all the numbers are " << average 
		 << " ." << endl;
	return 0;
}

[vlad from moscow]

@mjjm08910

Your code contains a bug. Let assume that the user entered one number equal to 0. In this case sum will be equal to 0 and count also will be equal to 0. So the statement

average = sum/count;

results in aborting the execution.

[ihq4izwU]

I'm sorry

vlad from moscow

. There's no need to assume that my code contains not a single bug. I only assume that the user will entered a desirable input. At least It shows the output desired by the one who posted this problem.

I'm not a pro, vlad. Still beginner... unlike you. Hmp. maybe =)

[vlad from moscow]

I do not understand such statements as "There's no need to assume that my code contains not a single bug" I think that if you provide a code you shall guarantee that it is correct.

[greenleaf800073]

data set should start at 0;

count = 0;