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Help in delphi programming

Can someone help me to write a program to calculate the value of x for which f(x) = 0 zero for the general quadratic equation. Use the quadratic formula.

a.The program should have input boxes for a, b and c where a, b, and c are the coefficients of x2, x1 and x0

b.And out put the solutions for x.

c.if the solution contains the square root of a negative number then the program should print the message this equation has complex roots and out put the complex roots.


plz i'm really in need of help

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  • zibadianzibadian Posts: 6,349Member
    : Can someone help me to write a program to calculate the value of x for which f(x) = 0 zero for the general quadratic equation. Use the quadratic formula.
    :
    : a.The program should have input boxes for a, b and c where a, b, and c are the coefficients of x2, x1 and x0
    :
    : b.And out put the solutions for x.
    :
    : c.if the solution contains the square root of a negative number then the program should print the message this equation has complex roots and out put the complex roots.
    :
    :
    : plz i'm really in need of help
    :
    :
    Place a couple of TLabels, TEdits and one TButton on the form. In the TButton.OnClick event code the following:
    Use the StrToFloat() to convert the TEdit.Text property to doubles. This will give you the a, b, c coefficients as numbers, so you can calculate with them.
    Then comes the maths part, just like you would do on paper. You might need an if-then-else-if-then-else statement to check the various answer possibilities:
    [code]
    if D < 0 then
    begin
    // Do something
    end else if D = 0 then
    begin
    // Do something else
    end else { no need for another if-then, because if the program gets
    this far, D is not smaller or equal to 0, thus greater than 0 }
    begin
    // Third do something
    end;
    [/code]
    Finally use FloatToStr() to convert the results back to strings to show them using another few TLabels.

    Check out the help files for more info on these objects, functions.
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