Résolution d’équation 2 eme degré ax^2+bx+c

#include<stdio.h>

#include<stdlib.h>

#include<math.h>

main()

{

      float a,b,c;

      float delta,x1,x2;

      printf("************** ax+bx^2+c=0 ****************\n");

      printf(" a = ");

      scanf("%f",&a);

      printf(" b = ");

      scanf("%f",&b);

      printf(" c = ");

      scanf("%f",&c);

      delta=pow(b,2)-4*a*c;

      if(delta>0)

      {

                 x1=(-b-sqrt(delta))/(2*a);

                 x2=(-b+sqrt(delta))/(2*a);

                 printf(" l'equation admet 2 solutions :\n %2.3f et %2.3f \n",x1,x2);

      }

      if(delta==0) { printf("l'equation n'a pas de solution dans IR\n"); }      

      if(delta<0)

      {

                 x1=(-b)/(2*a);

                 printf("l'equation admet une solution double %2.3f \n",x1);

      }

            system("pause");

      }