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#include "iostream"
#include "cmath"
using namespace std;
int main(){
double a,b,c;
double delta,x1,x2;
int sign,stop;
cout<<"ÊäÈë3¸öϵÊýa(a!=0),b,c"<<endl;
cin>>a>>b>>c;
if(a==0){
cout<<"a²»ÄܵÈÓÚ0!!!!²»È»Õâ¾Í²»ÊÇÒ»Ôª¶þ´Î·½³ÌʽÁË"<<endl;
exit(0);
}
delta=b*b-4*a*c;
if(delta==0){
cout<<"·½³ÌÓÐÁ½¸öʵ¸ù£ºx1=x2="<<-b/(2*a)<<endl;
}
else{
if(delta>0) sign=1;
else sign=0;
delta=sqrt(fabs(delta));
x1=-b/(2*a);
x2=delta/(2*a);
if(sign){
cout<<"·½³ÌÓÐÁ½¸ö²»Í¬µÄʵ¸ù£ºx1="<<x1+x2<<" x2="<<x1-x2<<endl;
}
else{
cout<<"·½³ÌÎÞʵ¸ù£¬ÓÐÁ½¸ö²»Í¬µÄ¸´Êý¸ù£ºx1="<<x1<<"+i"<<x2<<" x2="<<x1<<"-i"<<x2<<endl;
}
}


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