20分求助

#include <iostream>
#include <cmath>
#include <cstdio>
using namespace std;
double ans1(double a,double b,double c){
	double x1;
	x1=(-b+sqrt(b*b-4*a*c))*1.0/2*a;
	return x1;
}
double ans2(double a,double b,double c){
	double x2;
	x2=(-b-sqrt(b*b-4*a*c))*1.0/2*a;
	return x2;
}
int main(){
	double a,b,c;
	cin>>a>>b>>c;
	double n=b*b-4*a*c;
	if(n>0){
		if(ans1(a,b,c)>ans2(a,b,c)){
			printf("x1=%.5lf;x2=%.5lf",ans2(a,b,c),ans1(a,b,c));
		}else{
			printf("x1=%.5lf;x2=%.5lf",ans1(a,b,c),ans2(a,b,c));
		}
	}else if(n==0){
		printf("x1=x2=%.5lf",ans2(a,b,c));
	}else{
		cout<<"No answer!"<<endl;
	}
	return 0;	
}