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jjdg

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daividyuan

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3Â¥2012-10-19 11:07:28
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mary4job

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daividyuan: ½ð±Ò+4, ¡ïÓаïÖú, лл£¡ 2012-10-19 14:12:32
jjdg: ½ð±Ò+1, ¸Ðл²ÎÓë 2012-10-20 03:03:15
jjdg: ±à¼­ÄÚÈÝ 2012-10-20 03:03
jjdg: ±à¼­ÄÚÈÝ 2012-10-20 03:03
#include
#include
#include

void main()
{
double a,b,c;
double s;
double *e,*f;
void d(double a ,double b,double c,double s,double* e,double* f);
void de(double a ,double b,double c,double *e);
void x();
e=(double*)malloc(sizeof(double));
f=(double*)malloc(sizeof(double));
*e=0;
*f=0;

printf("Please input coefficient:\n" );
scanf("%lf%lf%lf",&a,&b,&c);
if(a==0)
{
   if(b==0&&c==0)
   printf("x is any number" );
   if(b==0&&c!=0)
   x();
   if(b!=0)
   {
     *e=-c/b;
     printf("%lf",*e);
    }
}
else
{
   s=(b*b-4*a*c);
   if(s<0)
    x();
   else
    {
     s=sqrt(s);
     printf("The equation is %lf  x^2 + %f x + %f\n",a,b,c);
     printf("s=%lf\n",s);
     if(s>0)
       {
        d(a,b,c,s,e,f);
        printf("%lf\n",*e);
        printf("%lf\n",*f);
        }
      else if(s==0)
      {
       de(a,b,c,e);
       printf("%lf\n",*e);
      }
   }
  }
}


void d(double a ,double b,double c,double s,double *e ,double *f)
{
   double m,n;
   m=-0.5*(b+s)/a;
   n=-0.5*(b-s)/a;
  *e=m;
  *f=n;


}

void de(double a ,double b,double c,double *e)
{
double m;
    m=-0.5*b/a;

*e=m;
}

void x()
{
printf("The equation has no root!\n" );

}

[ Last edited by jjdg on 2012-10-20 at 03:03 ]
4Â¥2012-10-19 12:01:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

mary4job

ľ³æ (СÓÐÃûÆø)

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