EQUATION DU DEUXIEME DEGRE

/* 
   Name: 
   Author: 
   Description: Equation du 2eme degré
   Date: 
   Copyright: 
*/
#include <stdio.h>
#include <math.h>
#include <conio.h>
int main()
{




float a,b,c,x,delta,x1,x2;

printf("Entrez les coefficients de l'equation (a*x^2+b*x+c)\n");
printf("a :");
scanf("%f",&a);
printf("b :");
scanf("%f",&b);
printf("c :");
scanf("%f",&c);

if (a==0) 
{
    if (b==0)
    {
        if (c==0)
        printf("Equation indéterminée");
        else 
        printf("Equation impossible");
     }
     else
     {
     x = -1*(c/b);
     printf("La solution de l'equation est %f",x);
     }
}
else

delta = (b*b) - 4*a*c ;

    if (delta<0)    
    printf("Pas de solution reelle");
    else
        if(delta==0)
        {
        x = -b*(2*a);
        printf("Il y a une solution double %f",x);
        }
        else
        {
        x1 = ( -b + sqrt(delta)) / (2*a);
        x2 = ( -b - sqrt(delta)) / (2*a);
        printf("Il y a deux solutions distinctes : %f et %f\n",x1,x2);
        }
getch();
}