你甚至不愿意说出题号
by cff_0102 @ 2024-03-28 21:40:35
《虚空求调》
by weak_in_code @ 2024-03-28 21:41:12
盲猜：
```cpp
if(x1>x2)
{
cout<<"x1=";
printf("%0.5lf",x2);
cout<<";";
cout<<"x2=";
printf("%0.5lf",x1);
}
```
by cosf @ 2024-03-28 21:44:39
@[love_nn](/user/737219) 虽然我不知道题号，但是你应该输入完就判断无解，而且判断无解不用加sqrt
i.e.
```
#include<bits/stdc++.h>
using namespace std;
int main()
{
double a,b,c,x1,x2;cin>>a>>b>>c;
if((b*b-4*a*c)<0)
{
cout<<"No answer!";
return 0;
}
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
if(x1==x2)
{
cout<<"x1=x2=";
printf("%0.5lf",x1);
}
if(x1<x2)
{
cout<<"x1=";
printf("%0.5lf",x1);
cout<<";";
cout<<"x2=";
printf("%0.5lf",x2);
}
if(x1>x2)
{
cout<<"x2=";
printf("%0.5lf",x2);
cout<<";";
cout<<"x1=";
printf("%0.5lf",x1);
}
return 0;
}
```
by BLuemoon_ @ 2024-03-28 21:46:59
@[cff_0102](/user/542457) @[weak_in_code](/user/753640) @[cosf](/user/516725) @[BLuemoon_](/user/701302) b2053抱歉了
by love_nn @ 2024-03-28 21:48:26
@[love_nn](/user/737219) 然后在x1>x2时，只是数字反过来，编号并不变，代码就是 cosf 巨佬说的了
by BLuemoon_ @ 2024-03-28 21:54:48
@[love_nn](/user/737219)
```cpp
#include<bits/stdc++.h>
using namespace std;
int main()
{
double a,b,c,x1,x2;cin>>a>>b>>c;
if(b*b-4*a*c<0)
{
cout<<"No answer!";
return 0;
}
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
if(x1==x2)
{
cout<<"x1=x2=";
printf("%0.5lf",x1);
}
if(x1<x2)
{
cout<<"x1=";
printf("%0.5lf",x1);
cout<<";";
cout<<"x2=";
printf("%0.5lf",x2);
}
if(x1>x2)
{
cout<<"x1=";
printf("%0.5lf",x2);
cout<<";";
cout<<"x2=";
printf("%0.5lf",x1);
}
return 0;
}
```
x1与x2打反了。
判断写错了。
by qiuzijin2026 @ 2024-03-28 21:55:32
```cpp
#include<bits/stdc++.h>
using namespace std;
int main()
{
double a,b,c,x1,x2;cin>>a>>b>>c;
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
if(x1==x2)
{
cout<<"x1=x2=";
printf("%0.5lf",x1);
}
else if(x1<x2)
{
cout<<"x1=";
printf("%0.5lf",x1);
cout<<";";
cout<<"x2=";
printf("%0.5lf",x2);
}
else if(x1>x2)
{
cout<<"x1=";
printf("%0.5lf",x2);
cout<<";";
cout<<"x2=";
printf("%0.5lf",x1);
}
else printf("No answer!");
return 0;
}
```
@[love_nn](/user/737219)
by jiadahao @ 2024-03-28 21:55:36
$
\begin{array}{l}
\mathop{{b}}\nolimits^{{2}}-4ac<0 \\
\end{array}
$时,sqrt会RE
by 2672434062xzl @ 2024-03-28 21:56:38