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Getting error

This is a discussion on Getting error within the C Programming forums, part of the General Programming Boards category; Hello, im new in C++ and im getting annoying error. Maybe anyone could explain me where is the problem. Compiler ...

  1. #1
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    Getting error

    Hello, im new in C++ and im getting annoying error. Maybe anyone could explain me where is the problem. Compiler shows that a problem is in a line 20 If (D<0).
    Code:
    #include <stdio.h>
    #include <stdlib.h>
    int main ()
    {
        float a,b,c,D,x1,x2;
        printf ("Iveskite a kintamaji \n");
        scanf ("%f",a);
        printf ("Iveskite b kintamaji \n");
        scanf ("%f",b);
        printf ("Iveskite c kintamaji");
        scanf ("%f",c);
        if (a=0)
        {
        printf ("Lygtis ne kvadratine, niekas nebus apskaiciuota \n");
        system ("pause");
        return 0;
        }
         else
          D =(b*b) - (4*a*c);
        If (D<0)
         printf ("Sprendiniu nera \n");
        else 
        {
        x1= ((-1)*b-sqrt(D))/(2*a);
         x2= ((-1)*b+sqrt(D))/(2*a);
        Printf ("Atsakymai: %f, %f \n",x1,x2);
        system ("pause");
        return 0;
        }
    }
    Last edited by Valancius; 09-30-2012 at 07:58 AM.

  2. #2
    SAMARAS std10093's Avatar
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    Replade If with if

    Also mind that in scanf function you should pass the address of the variable.Example
    Code:
    int i;
    scanf("%d",&i);
    Why?Because this is what the prototype of the function needs in order to maintain the modification made by input.

  3. #3
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    Quote Originally Posted by std10093 View Post
    Replade If with if

    Also mind that in scanf function you should pass the address of the variable.Example
    Code:
    int i;
    scanf("%d",&i);
    Why?Because this is what the prototype of the function needs in order to maintain the modification made by input.
    O, thanks. Just missed

  4. #4
    C++まいる!Cをこわせ! Elysia's Avatar
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    This is C, not C++.
    Salem and Click_here like this.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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