output problem with cout <<

[cheesepuffgd]

when I compile this program:

#include <cstdlib>
#include <iostream>
#include <limits>
#include <string>
#include "math.h"
using namespace std;

double a,b,c,Discriminant,thingy;
int main()
{
    cout << "Please enter the first coefficient:";
    cin >> a;
    cout << "Please enter the second coefficient:";
    cin >> b;
    cout << "Please enter the third coefficient:";
    cin >> c;
    if (Discriminant < 0)
      {
                       cout << "\nNo Solutions.\n";
                       return 0;
                       
      }
      if (Discriminant == 0)
                       cout << "\nOne solution\n";
    Discriminant = ((0-b) + sqrt(Discriminant))/2;
    thingy = ((0-b) - sqrt(Discriminant))/2;
    thingy = 1.16315432;
    cout << "The answers are " << Discriminant << " and " << thingy;
    system("PAUSE");
    return 0;
}

I get this output:

Please enter the first coefficient:XXX
Please enter the second coefficient:XXX
Please enter the third coefficient:XXX
the answers are XXXX and X.#INDPress any key to continue...

[firedraco]

I see.

[cnoeval]

I don't.

How is this a "problem with cout <<"?

[waynev]

Using 1; 1; 4 your code returns:

One solution
sh: PAUSE: not found
The answers are -0.5 and 1.16315

edit: however the solution is incorrect!

[Computergeek01]

Maybe I'm not paying enough attention but where is the value of Discriminant declared? Not the variable I can see it up there as a global but it looks like you're leaving Discriminant up to What ever left overs are in that memeory space.

BTW this might explain the strange output.

[cmccmc]

also replace system("PAUSE") with something like:
cin.ignore();
cin.get();

[Disch]

firedraco wrote:

I see.

I lol'd

[jojojlj]

Try initializing all your variables, then it'll be easier to see where you went wrong (theoretically at least). Also, Computergeek01 is correct, I can't see where you tell the computer what Discriminant is equal to. One more mistake I see is that you declare thingy to be a value that isn't one of the solutions.

[waynev]

don't give up -- ask more questions!

[amit0991]

initialise the value of discriminant and thingy

[cheesepuffgd]

#include <cstdlib>
#include <iostream>
#include <limits>
#include <string>
#include "math.h"
using namespace std;

double a,b,c,Discriminant,thingy;
int main()
{
    poop:
    cout << "Please enter the first coefficient:";
    cin >> a;
    cout << "\nPlease enter the second coefficient:";
    cin >> b;
    cout << "\nPlease enter the third coefficient:";
    cin >> c;
    Discriminant = (b*b) - 4*a*c;
    if (Discriminant < 0)
      {
                       cout << "\nNo Solutions.\n";
                       goto poop;
                       
      }
      if (Discriminant == 0)
                       cout << "\nOne solution\n";
    Discriminant = ((0-b) + sqrt(Discriminant))/2;
    thingy = ((0-b) - sqrt(Discriminant))/2;
    cout << "The answers are " << Discriminant << " and " << thingy;
    system("PAUSE");
    return 0;
}

this code now outputs at the end...

the solutions are XXX and XXXPress any key to continue...

Why would it output that if I don't tell it to output "Press any key to continue..."
thanks for the help with the #IND problem....

[BettyBoopTS]

the system ("PAUSE") statement will prompt the output "Press any key to continue,,," reread cmccmc's post on alternative statements.


also system("pause>nul"); will output a pause without the prompt

[gcampton]

you say the code outputs

the solutions are...

but your cout says cout << "The answers are " <<

So either the code or the output is lying.

If you get errors when compiling perhaps your IDE is grabbing an old exe to run.