#include<iostream>
using namespace std;
const int MAX=100000;
bool is_prime[MAX];int main()
{int n;cin>>n;for(int i=2;i<=n;i++)is_prime[i]=1;for(int i=2;i*i<=n;i++){if(is_prime[i]){for(int j=i*i;j<=n;j+=i)is_prime[j]=0;}}if(is_prime[n])cout<<n<<" is prime"<<endl;else cout<<n<<" is not a prime"<<endl;}
#include<iostream>
using namespace std;double compare(double a,double b)
{if(a<b)return a;else if(a==b)return a;
}
long compare(long a,long b)
{if(a<b)return a;else if(a==b)return a;
}int compare(int a,int b)
{if(a<b)return a;else if(a==b)return a;
}char compare(char a,char b)
{if(a<b)return a;else if(a==b)return a;
}int main()
{cout<<compare(1.1,2.2)<<endl;cout<<compare(3,6)<<endl;cout<<compare('a','b')<<endl;}
3、定義一個(gè)Teacher(教師)類(lèi),在該類(lèi)定義中包括數(shù)據(jù)成員: Name 《姓名)Sex (性別)、Salary(工資)和Reward(獎(jiǎng)企):成員麗數(shù):構(gòu)造函效leacher, 設(shè)置姓名、性別、工成和獎(jiǎng)金四個(gè)初始數(shù)據(jù):用函效money計(jì)算并輸出教師的總錢(qián)數(shù)。在main函數(shù)中,要求創(chuàng)建對(duì)家,并輸出某個(gè)教師的總銀數(shù)