[求助]这个程序应该怎样编写？
题目：编写程序求一元二次方程ax2+bx+c=0的根，输出方程的根（假定方程有实根）。
2007-11-20 14:25
//假定b2-4ac>=0，a!=0
#include<iostream>
#include<math.h> //for sqrt
using namespace std;
int main()
{
double a,b,c;
cout<<"Enter a:";
cin>>a;
cout<<"Enter b:";
cin>>b;
cout<<"Enter c:";
cin>>c;
cout<<"x1 = "<<(-b+sqrt(b*b-4*a*c))/(2*a)<<endl;
cout<<"x1 = "<<(-b-sqrt(b*b-4*a*c))/(2*a);
}
2007-11-20 15:12
2007-11-20 16:28
2007-11-20 16:41
2007-11-20 16:42
2007-11-20 18:46
2007-11-20 20:31
太难了，看不懂，都忘了
2007-11-20 21:20
