多分支运算

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n>=30)
{
    cout<<n*1.0<<endl;
}
    else if(n>=20 && n<=29)
{
    cout<<n*1.2<<endl;
}
    else if(n>=10 && n<=19)
{
    cout<<n*1.5<<endl;
}
    else
{
cout<<n*1.8<<endl;
}        
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
    int n;        
    cin>>n;
    if(n>=86)
    {
        cout<<"VERY GOOD";
    }
    else if(n>=60 && n<=85)
    {
        cout<<"GOOD";
    }
    else 
    {
        cout"BAD";
    }
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n<10)
	{
		cout<<"A"<<endl;
	}
	else if(n>=10 && n<20)
	{
		cout<<"B"<<endl;
	}
	else if(n>=20 && n<40)
	{
		cout<<"C"<<endl; 
    }
	else if(n>=40 && n<50)
	{
		cout<<"D"<<endl;
	}
	else if(n>=50 && n<80)
	{
		cout<<"E"<<endl;
	}
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
   cout<<"请输入三个数a,b,c"<<endl;
   int a,b,c;
   cin>>a>>b>>c;
   if(a>b)
   {
       if(a>c)
       {
           cout<<"a:"<<a<<endl;
       }
       else
       {
           cout<<"c:"<<c<<endl;
       }
  }
  else
  {
       if(b>c)
       {
          cout<<"b:"<<b<<endl；
       else
       }
          cout<<"c:"<<c<<endl;
       return 0;
}

#include<iostream>
using namespace std;
int main()
{
	int n;
	cin>>n;
    if(n>=200 && n<=299)
{
	cout<<n+50<<endl;
}
	else if(n>=300 && n<=499)
{
	cout<<n+100<<endl;
}
	else if(n>=500)
{
	cout<<n+200<<endl;
}
	else if(n<200)
{
	cout<<n<<endl;
}
    return 0;
}

#include<iostream>
using namespace std;
int main()
{
	int n;
	cin >>n;
	if(n>=10000 && n<=9999999999)
	{
		cout<<"wan"<<endl;
		cout<<"shi wan"<<endl;
		cout<<"bai wan"<<endl;
		cout<<"qian wan"<<endl;
		cout<<"yi"<<endl;
		cout<<"shi yi"<<endl;
	}
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
   cout<<"请输入四个数a,b,c,d"<<endl;
   int a,b,c,d;
   cin>>a>>b>>c>>d;
   if(a>b && a>c && a>d) cout<<a<<endl;
   else if(b>a && b>c && b>d) cout<<b<<endl;
   else if(c>a && c>b && c>d) cout<<c<<endl;
   else if(d>a && d>b && d>c) cout<<d<<endl;
   return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
   cout<<"请输入三个数a,b,c"<<endl;
   int a,b,c;
   cin>>a>>b>>c;
   if(a>b)
   {
       if(a>c)
       {
           cout<<"c-b"<<a<<endl;
       }
       else
       {
           cout<<"c-a"<<c<<endl;
       }
  }
  else
  {
       if(b>c)
       {
          cout<<"b-a"<<b<<endl；
       else
       }
          cout<<"b-c"<<c<<endl;
       return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n>=90)
{
    cout<<n*3<<endl;
}
    else if(n>=80 && n<90)
{
    cout<<n*2<<endl;
}
    else if(n>=70 && n<80)
{
    cout<<n<<endl;
}
    else if(n<70)
{
    cout<<50<<endl;
}        
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n>10)
{
    cout<n=25<<endl;
}
    else if(n>=7 && n<=10)
{
    cout<<n=15<<endl;
}
    else if(n>=3 && n<=6)
{
    cout<<n=5<<endl;
}      
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n,m,b,v,c,x,z;
	cin>>n>>m>>b>>v>>c>>x>>z;
	if(n>=1)
{
    cout<<n/1<<endl;
}
    else if(n>=2)
{
    cout<</2<<endl;
}
    else if(n>=3)
{
    cout<<n/3<<endl;
}
    else if(n>=4)
{
    cout<<n/4<<endl;
}        
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n>=1)
{
    cout<<"one"<<endl;
}
    else if(n>=2)
{
    cout<<"two"<<endl;
}
    else if(n>=3)
{
    cout<<"three"<<endl;
}
    else if(n>=4)
{
    cout<<"four"<<endl;
}
    else if(n>=5)
{
    cout<<"five"<<endl;
} 
    else if(n>=6)
{
    cout<<"six"<<endl;
}  
    else if(n>=7)
{
    cout<<"seven"<<endl;
} 
    else if(n>=8)
{
    cout<<"eight"<<endl;
} 
    else if(n>=9)
{
    cout<<"nine"<<endl;
}        
    else if(n>9)
{
    cout<<"out"<<endl;
}        
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n>=92.8)
{
    cout<<"jin"<<endl;
}
    else if(n>=85.6 && n<92.8)
{
    cout<<"yin"<<endl;
}
    else if(n>=82.1 && n<85.6)
{
    cout<<"tong"<<endl;
}
    else if(n<82.1)
{
    cout<<"sorry"<<endl;
}        
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n=1)
{
    cout<<"swim"<<endl;
}
    else if(n=2)
{
    cout<<"rest"<<endl;
}
    else if(n=3)
{
    cout<<"program"<<endl;
}
    else if(n=4)
{
    cout<<"rest"<<endl;
}  
    else if(n=5)
{
    cout<<"read"<<endl;
}  
    else if(n=6)
{
    cout<<"math"<<endl;
}  
    else if(n=7)
{
    cout<<"rest"<<endl;
}               
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	cin>>n;
	if(n>=15 && n<=30)
{
    cout<<"qingnianju"<<endl;
}
    else if(n>=11 && n<=14)
{
    cout<<"shaonianju"<<endl;
}
    else if(n>=8 && n<=10)
{
    cout<<"ertongju"<<endl;
}
    return 0;
}