where is the error to make this program work ?

[matthacker]

Hope you can help find the error. it wont calculate d and x properly

Matthacker

#include <stdio.h>
#include <math.h>




int main ( void )
{
	float a;
	float b;
	float c;
	float d;
	float x;
	


	a = 0, b= 0, c = 0, d = 0, x = 0;
	x = (-b +- sqrt(d)) / (2*a);
	d = (pow( b, 2)) - (4*a*c);


	printf ( "please input the three numbers in the 2nd degree polynomium:");
	scanf ("%f%f%f", &a,&b,&c);
	printf ( " the polynomium is:" );
	{
	if ( a < 0 )
		printf("%fx^2",a);
	else
		printf("%fx^2",a);
	if ( b < 0 )
		printf("%fx",b);
	else
		printf("+%fx",b);
	if ( c < 0 )
		printf("%f",c);
	else
		printf("+%f",c);


	printf ( " = 0 \n");
	}
	
	printf (" diskriminanten er: %f\n", d);
	printf(" x er:%f",x);


	return 0;
}

[CommonTater]

Hope you can help find the error. it wont calculate d and x properly

That's because you are trying to calculate your results before you know what values they operate upon.

Move lines 18 and 19 to line 42.

[matthacker]

thanks

[CommonTater]

No worries... Just remember the cardinal rule when programming...

Compilers are STUPID... you gotta tell them *everything* and in the right order, if you want to get the correct result.