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help me on this tutorial

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fadia

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help me on this tutorial

May 29th, 2009

heey guys..
i just learned the arrays.. am not really good at them..
can some one simplify it for me..

i gat this question.. i tried to solve it.. but didn't get the desired output

how ever it says 1 succeeded !

here's the Q:
1. Declare one array for storing the square roots of the integers from 0 through 10.

2. Declare one array for storing the cubes of the same integers.

3. Write a program that reads 10 integers and prints them in reverse order .

this is my work.. i'm pretty sure it's wrong..

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
using namespace std;
 
int main ()
{
 
	int SQUARE_ROOTS [10];
 
	cout<<"Enter 10 numbers:"<<endl;
		for(int i=1;i>=10;i++)
		cin>>SQUARE_ROOTS [i];
 
		for(int i=1;i>=10;i--)
 
	cout<<"The numbers in reverse order are:"<<endl
		<<SQUARE_ROOTS [i];
 
return 0;
}
#include <iostream>
using namespace std;

int main ()
{

	int SQUARE_ROOTS [10];
	
	cout<<"Enter 10 numbers:"<<endl;
		for(int i=1;i>=10;i++)
		cin>>SQUARE_ROOTS [i];
	
		for(int i=1;i>=10;i--)

	cout<<"The numbers in reverse order are:"<<endl
		<<SQUARE_ROOTS [i];
	
return 0;
}

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VernonDozier VernonDozier is offline

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Re: help me on this tutorial

May 29th, 2009

You shouldn't read in a square root or a cube. You CALCULATE the square root or the cube. Thus this is incorrect:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
	cout<<"Enter 10 numbers:"<<endl;
		for(int i=1;i>=10;i++)
		cin>>SQUARE_ROOTS [i];
	cout<<"Enter 10 numbers:"<<endl;
		for(int i=1;i>=10;i++)
		cin>>SQUARE_ROOTS [i];

Don't read in data into the SQUARE_ROOTS array. You shouldn't be reading numbers in from the user in this part of the program anyway.

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1. Declare one array for storing the square roots of the integers from 0 through 10.

2. Declare one array for storing the cubes of the same integers.

The numbers range from 0 to 10. There is no need to ask for user input.

You ask for user input in the third part.

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3. Write a program that reads 10 integers and prints them in reverse order .

but that has nothing to do with cubing or taking a square root, so create a different array and call it something different (i.e. userInput ).

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fadia

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Re: help me on this tutorial

May 29th, 2009

i didn't really understood that..

thanks though

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Re: help me on this tutorial

May 29th, 2009

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Originally Posted by fadia

i didn't really understood that..

thanks though

There's not much anyone can do with this post. The obvious question is "What part of my post don't you understand?" We aren't mind readers and posting on a forum requires some effort on your part. You need to ask a specific question.

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mirfan00

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Re: help me on this tutorial

May 29th, 2009

Hi
your question is you just store square rott and cube of first 10 integers.And in your code you get user user input which is incorrect.
First of all you just run a for loop of maximum 10 values in which you do your work e.g square root anf cube anf ten store them in arrays.
If you cannot understand or feel difficulty in coding tell me i will help you and give you a code.

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fadia

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Re: help me on this tutorial

May 29th, 2009

yeah i'm having some difficulties to understand anything written.. i need some examples to get a certain idea.. if u don't mind give me an example for a similar question..

thnks

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Re: help me on this tutorial

May 29th, 2009

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Originally Posted by fadia

Help with Code Tags

C++ Syntax (Toggle Plain Text)
 
for(int i=1;i>=10;i++)
 
for(int i=1;i>=10;i--)
 
}
for(int i=1;i>=10;i++) for(int i=1;i>=10;i--) }

besides arrays you should also brush up on for loops...

neither of those will even be entered into (seeing as 1 is NOT greater than or equal to 10). For the first loop you'd need to switch it to this for your code to at least make sense:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
for(int i = 0; i < 10; i++)
for(int i = 0; i < 10; i++)

and your second loop

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
for(int i = 9; i >= 0; i--);
for(int i = 9; i >= 0; i--);

notice I switched it from going from 1-10 and 10-1 to 0-9 and 9-0 because arrays use a 0 index for the first element. Look over this loop and see if you can get the idea of how it's getting filled

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
int values[10];
 
for(int x = 0; x < 10; x++)
{
     values[x] = x+1; //values[0] = 1, ... values[9] = 10
 
     std::cout << "values[" << x << "] = " << values[x] << std::endl;
}
int values[10];

for(int x = 0; x < 10; x++)
{
     values[x] = x+1; //values[0] = 1, ... values[9] = 10

     std::cout << "values[" << x << "] = " << values[x] << std::endl;
}

hope that's helpful

~J

Last edited by jesseb07; May 29th, 2009 at 5:20 pm. Reason: added cout

Ps. 121

Makes it easier on everyone: http://www.daniweb.com/forums/thread78223.html

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Join Date: May 2009

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mirfan00

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Re: help me on this tutorial

May 30th, 2009

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Originally Posted by fadia

yeah i'm having some difficulties to understand anything written.. i need some examples to get a certain idea.. if u don't mind give me an example for a similar question..

thnks

Dear I'll try my level best to solve your problem.

 Help with Code Tags 
 cpp Syntax (Toggle Plain Text) 
//This code store cube of an integer in an array
// declarations
int array[];
int store;
for ( int c=1;c<=10;c++ ) {
      // primary storage 
      store = c*c*c;
    // store cube of the integer in an array
      array [c] = store;
} // for
'c' is the value of an integer which increases as 1,2,3,.......,10.
// Display in reverse order
for (int c=1;c<=10;c++ ) {
     // store value in an array 
     array[c] = c;     
}//for
for (int c=10;c--) {
   // display array in reverse order
        cout << array[c];
 
}/for
//This code store cube of an integer in an array
// declarations
int array[];
int store;
for ( int c=1;c<=10;c++ ) {
      // primary storage 
      store = c*c*c;
    // store cube of the integer in an array
      array [c] = store;
} // for
'c' is the value of an integer which increases as 1,2,3,.......,10.
// Display in reverse order
for (int c=1;c<=10;c++ ) {
     // store value in an array 
     array[c] = c;     
}//for
for (int c=10;c--) {
   // display array in reverse order
        cout << array[c];

}/for

I hope you enjoy it. Any problem tell me.

Last edited by Tekmaven; May 30th, 2009 at 9:06 pm. Reason: Code Tags

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Re: help me on this tutorial

May 30th, 2009

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Originally Posted by mirfan00

Any problem tell me.

Three problems. One, use code tags. Two, don't give away all the code. Give hints and advice. Three, if you decide to give away all the code, make sure it's code that compiles.