c++

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int a,b,c;
int main()
{
    cin>>a>>b>>c;
    cout<<setiosflags(ios::fixed)<<setprecision(4);
        if((b*b-4*a*c)>0)
    {
        double x=(-b-sqrt(double(b*b-4*a*c)))/2/a;
        double y=(-b+sqrt(double(b*b-4*a*c)))/2/a;
        if(x<y)
            cout<<x<<endl<<y;
        else 
            cout<<y<<endl<<x;
    }
    if((b*b-4*a*c)==0)
        cout<<(-b+sqrt(1.0*(b*b-4*a*c)))/(2*a)<<endl;
    if((b*b-4*a*c)<0)
        cout<<"No Answer!"<<endl;
    return 0;
}

 

#include<iostream>//p1018
#include<cmath>
#include<iomanip>
using namespace std;
int main()
{
    int a,b,c;
    int flag1=0,flag2=0,flag3=0;
    cin>>a>>b>>c;
    if(a+b>c&&a+c>b&&b+c>a)
    {    
        if(a==b&&b==c)
            cout<<"yse"<<endl;
        else 
            cout<<"no"<<endl;;
        if(a==b||a==c||b==c)
            cout<<"yse"<<endl;
        else 
            cout<<"no"<<endl;
        cout<<"yse"<<endl;
    }
    else
        cout<<"no"<<endl<<"no"<<endl<<"no";//第一种写法
    //第二种
    if(a==b&&b==c)
        flag1=1;
    if(a==b||b==c||a==c)
        flag2=1;
    if(a+b>c&&a+c>b&&b+c>a)
        flag3=1;
    if(flag3==0)
    {
        cout<<"no"<<endl<<"no"<<endl<<"no";
        return 0;
    }
    if(flag1)
        cout<<"yse"<<endl;
    else    
        cout<<"no"<<endl;
    if(flag2)
        cout<<"yse"<<endl;
    else 
        cout<<"no"<<endl;
    cout<<"yse";
    return 0;
}

我就是有点儿无聊⊙﹏⊙