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Oct 4th, 2007
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Confused about some C++ programs

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Hey guys, i need some help with 2 programs that my teacher assigned me..

I just cant seem to figure them out. I'll type out what the program is, but I really dont have much code to show since I dont really know how to even get started so any help would be welcomed..

The only part I really dont know how to do is the average part.

--------------------------------

1. Write a program that asks the usr for a positive integer value. The program should use a "while-loop" to get the sum of all the integers from 1 to the number entered.
Last edited by mattb_25; Oct 4th, 2007 at 5:53 pm.
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Re: Confused about some C++ programs

Quote ...
1. Write a program that asks the usr for a positive integer value. The program should use a "while-loop" to get the sum of all the integers from 1 to the number entered.
post some code....

where did you get stuck?
tip:: you read a number and then you use it as as an "end" condition in a for loop
Last edited by n.aggel; Oct 4th, 2007 at 6:00 pm.
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Re: Confused about some C++ programs

Here's all I got.. I just don't know how to find the sum of the numbers between 1 and the number they entered.. :\
C++ Syntax (Toggle Plain Text)
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6. 	int num = 1;
  7. 	int picknum = 0;
  8.  
  9. 	cout << "Chose a positive number." << endl;
  10. 	cin >> picknum;
  11.  
  12. 	while (num ???)
  13. 	{
  14. 		cout << "The sum of the number 1 to your desired number = " << (num
Last edited by Ancient Dragon; Oct 4th, 2007 at 8:17 pm. Reason: add code tags
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>>I just don't know how to find the sum of the numbers between 1 and the number they entered

How would you do it yourself with pencil & paper? If I enter 5 then you want 1+2+3+4+5. Now do the same thing with a loop and two counters -- one counter is a loop counter and the other variable is the sum of the value of the loop counter on each iteration of the loop.
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Re: Confused about some C++ programs

Would I use a count-controlled loop? I'm still trying to figure out how to use the loops and counters since I just learned about them in class so sorry for the newbie questions.
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Re: Confused about some C++ programs

Your instructions say you must use a while loop. You will need two integers, one to count from 1 to whatever number you enter, and the other to sum up the values. Do it a little bit at a time so that you don't get overwhelmed. First how to create that while loop. After you get that done then add the counter to count from 1 to N. Only after that works do you worry about the sum integer.
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