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joeyke
joeyke
Last Activity: Dec 24 '10, 02:43 PM
Joined: Feb 19 '10
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  • joeyke
    started a topic can someone tell me why nothing happens when I run this(codeblocks)program on my mac?
    in C

    can someone tell me why nothing happens when I run this(codeblocks)program on my mac?

    Code:
    #include <iostream>
#include <fstream>
#include <string>
#include <cctype>
using namespace std;

//function prototypes
void initialize(int [], int);
int readData(char [], int, int [], int);
void printResults(char [], int, int [], int, int);

//constant global variables used for arrays
const int LIMIT = 27;
const int ALPHA = 26;
    ...
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    • joeyke
      replied to Evaluating Expressions
      in C
      this is what i did so far but i know i'm totally off

      #include <cmath>
      #include <iostream>
      using namespace std;
      int main()
      {

      double y;

      cout<<" Enter an value for y: ";
      cin>>y;

      double check;
      check=(y>0)+((y-1) / y))+((y > 2 y / (y-1));
      cout<<" y= ";
      cin>>y;...
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        Leave a comment:

      • joeyke
        started a topic Evaluating Expressions
        in C

        Evaluating Expressions

        How do I go about writing a program that finds and prints the values of result for all even values of y from 2 to 16, using the following formula:
        result= (y-1) + (y+4)3
        y -
        1
        y

        * the 3 is power to 3
        *the denominator means y minus 1 over y, just couldn't get it to stay on the same line.
        I just don't know where to start. please help!
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        • joeyke
          replied to Quadratic equation solver
          in C
          that's what prints now after i did
          double check;
          check=(b*b)-(4*a*c);
          cout<<" posx ="<<posx<<" negx = "<<negx;
          cin>>posx, negx;
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            Leave a comment:

          • joeyke
            replied to Quadratic equation solver
            in C
            wait i get it!
            Enter the value of a: 1
            Enter the value of b: 4
            Enter the value of c: 6
            posx =-3.81582e-232 negx = 0

            is this right?
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            • joeyke
              replied to Quadratic equation solver
              in C
              i still get this in my output:
              Enter the value of a: 1
              Enter the value of b: 2
              Enter the value of c: 3

              should there a calculation done in my output? if so then why isn't it printing that?
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              • joeyke
                replied to Quadratic equation solver
                in C
                after i think. is it like this:

                if (check>0)
                {
                cout<<" posx ="<<posx<<" negx = "<<negx;

                cin>>posx, negx;

                posx=(-b+sqrt(check))/2*a;

                negx=(-b-sqrt(check))/2*a;


                system ("pause");

                return 0;

                }

                }
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                • joeyke
                  replied to Quadratic equation solver
                  in C
                  where do i put that? after this:
                  posx=(-b+sqrt(check))/2*a;
                  negx=(-b-sqrt(check))/2*a;
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                  • joeyke
                    replied to what is wrong with line 27 and 31?
                    in C
                    hey

                    thanks for your help ! i made the changes you suggested and they worked but i get an endless sentence repeated many times in my output. how can i just get it to print out one sentence?
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                    • joeyke
                      replied to Quadratic equation solver
                      in C
                      yes

                      oh yeah ! how do i go about that in my program? thank for you help btw!
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                      • joeyke
                        replied to Quadratic equation solver
                        in C
                        in my output it doesn't go beyond entering a value

                        i don't know how the output should look like because from what i get it shows this:
                        Last login: Thu Feb 25 21:57:40 on ttys000
                        /Volumes/JOANNEKEO/C++1.5/HWkeoAssignment 2-3A
                        joanne-keos-macbook:~ joanne$ /Volumes/JOANNEKEO/C++1.5/HWkeoAssignment 2-3A
                        Enter the value of a: 5
                        Enter the value of b: 6
                        Enter the value of c: 3
                        joanne-keos-macbook:~...
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                        • joeyke
                          started a topic Quadratic equation solver
                          in C

                          Quadratic equation solver

                          Ask the user to enter the coefficients a, b and c. Have your program then solve the two (or possibly one) solution(s) for X. Be careful to make sure there is a solution by confirming that the square root is not executed on a negative number which is considered to be imaginary.

                          Be sure to #include<cmath> and call the pow() and sqrt() functions when making your math calculations. Also note, the coefficients a b and c are to be declared...
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                          Last edited by Banfa; Feb 26 '10, 09:43 AM. Reason: Added code tags
                          • joeyke
                            replied to How do I go about writing positive, neg, zero, and even or odd???
                            in C
                            line 27 and line 31 have an errors but i don't know what they are

                            Code:
                            #include <iostream>

using namespace std;

int main ()
{
    int numb1;
    int numb2;


    cout<<" enter one number: ";
    cin>>numb1;
    for (numb1=numb1+0;numb1>0;)
    {
        cout<<numb1<<" is positive";
    }
                            ...
                            See more | Go to post
                            Last edited by Banfa; Feb 26 '10, 09:44 AM. Reason: Added code tags

                              Leave a comment:

                            • joeyke
                              started a topic what is wrong with line 27 and 31?
                              in C

                              what is wrong with line 27 and 31?

                              this was my task: Ask the user to enter a number, and then read in the number from the keyboard. Print out the number and also output whether the number is positive, negative or zero, and also output whether the number is even or odd.
                              look at my program attached to this post. thanks!
                              }
                              for (numb1=numb1+0; numb1%2=0;) //line27 error:invalid lvalue in assignment
                              {
                              cout<<" and is positive";...
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                              • joeyke
                                started a topic How do I go about writing positive, neg, zero, and even or odd???
                                in C

                                How do I go about writing positive, neg, zero, and even or odd???

                                Write a complete C++ program, including comments, to do the following:

                                Ask the user to enter a number, and then read in the number from the keyboard. Print out the number and also output whether the number is positive, negative or zero, and also output whether the number is even or odd.
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