equation 2ème degré.cpp

     download: equation 2ème degré.exe
                  #include<conio.h>
#include<stdio.h>
#include<math.h>
main()
{
      float a,b,c,d,x1,x2;
      printf("entrez la valeur de a : ");
      scanf("%f",&a);
      printf("entrez la valeur de b : ");
      scanf("%f",&b);
      printf("entrez la valeur de c : ");
      scanf("%f",&c);
      if((a==0) && (b==0) && (c==0))
      {{
      printf("la solution est R");}
      if((c=!0)&& (b==0) && (a==0))
      {printf("error");}
      if((b=!0)&& (a==0) && (c==0))
      {
              x1=-c/b;}
              if(a=!0)
              {
                      d=(b*b)-(4*a*c);
                      if(d>0)
                      {x1=(-b-(sqrt(d)));
                      x2=(-b+(sqrt(d)));}
                      if(d==0)
                      {x1=-b/(2*a);}
                      else{
                           printf("pas de solution");}
                           }}
                           printf("x1=%f\n",x1);
                           printf("x2=%f\n",x2);
     
getch();
}