一、代码实现
1 #include<iostream> 2 using namespace std; 3 int main() 4 { 5 int m;//要判断的数 6 bool flag=true; 7 cout<<"Please enter a number:"<<endl; 8 cin>>m; 9 for (int i=2;i<m;i++) 10 { 11 if (m%i==0) 12 { 13 flag=false; 14 break; 15 } 16 } 17 if (flag==true) 18 cout<<m<<" is a prime number."<<endl; 19 else 20 cout<<m<<" is not a prime number."<<endl; 21 }
二、运行演示
