Technology Zone

[GraNAdoEspadA]

Please help me!!!

Im a 1st yr IT student and seems I dont understand the problem that my instructor have given to me...

This is her problem given to me:

Write a program that would input a positive integer N and then outputs the sum of the squares of the integers from 1 to N. For example, if the input is 5 the output should be 55. (that is 1^2 + 2^2 + 3^2 + 4^2 + 5^2 = 55)

please help me I wanna answer it so badly but i dunno what is the exact formula...

I have logical error in my brain! Thanks...

[Sean]

Write a program that would input a positive integer N and then outputs the sum of the squares of the integers from 1 to N. For example, if the input is 5 the output should be 55. (that is 1^2 + 2^2 + 3^2 + 4^2 + 5^2 = 55)

hmm...

so...

Get Input

You could do this in a loop

asm style:

.WHILE (input > 0)
mov ecx, input ;e.g. 5
imul ecx, ecx ;5 * 5 (square)
sub input, 1
add output, ecx
.ENDW

not too certain on c++ syntax.

but the algorithm would be:

Get Input
Store Input into a Variable (e.g. Input)
Create a loop that loops while Input > 0
Inside loop have it multiply current value stored in Input by itself (to square it) and then add that to an output variable. Then decrement value stored in Input.
Then when loop is exited, output the # that's currently in the output variable.

'Name: Sean
'Date: October 11, 2008
'Description: Write a program that would input a positive integer N and then outputs the sum of the squares of the integers
'             from 1 to N. For example, if the input is 5 the output should be 55. (that is 1^2 + 2^2 + 3^2 + 4^2 + 5^2 = 55)
Option Explicit

Sub GzNProblem()

    Dim InputVar As Long
    Dim OutputVar As Long
    Dim OrigInput As Long
    
    InputVar = InputBox(\"Enter a positive integer\", \"Get positive integer\")
    OrigInput = InputVar
    If InputVar >= 0 Then
        Do Until (InputVar = 0)
            OutputVar = OutputVar + (InputVar * InputVar)
            InputVar = InputVar - 1
        Loop
        MsgBox (\"You entered: \" & OrigInput & \". The result is: \" & OutputVar), 32, \"Result\"
    Else
        MsgBox (\"You entered a negative integer! Only enter a positive integer.\"), 32, \"Error\"
    End If
    
End Sub

This would be the VB code for your problem. Just tested it out, works. (the random slashes in the code were added by GzN - remove them if you want to compile it).

[GraNAdoEspadA]

What!!! thanks a lot... I understand a bit of the concept but?

Im just just a beginner to uses Simple C++ like(#include<stdio.h>)

thnksss.......

[cosmeo3000]

In C++:

#include <iostream>

using namespace std;

int main()
{
	int n = 0;
	int nTotalSum = 0;

	cout << \"Choose a number: \";
	cin >> n;
	if(n < 0)
	{
		cout << \"Since your number is negative, it will be converted to positive.\";
		n *= -1;
	}
	cout << endl;
	
	for(int i = 0; i <= n; i++)
	{
		nTotalSum += (i * i);
	}

	cout << \"The total is \" << nTotalSum << endl;
}

Same deal here. Remove the \ in the code if you want to compile

[GraNAdoEspadA]

Thnaks man you give me the idea... I understand now the processess....