编辑代码

#include <iostream>
using namespace std;
int main()
 {
     int a=21;
     int b=10;
     int c;
    
    if(a==b)
    {
        cout<<"Line 1-a等于b"<<endl;

    }
    esle
    {
        cout<<"Line 1-a不等于b"<<endl;
    }
    if(a<b)
    {
        cout<<"Line 2-a小于b"<<endl;
    }
    esle 
    {
    cout<<"Line 2-a不小于b"<<endl;
    }
   if(a>b)
   {
   cout<<"Line 3-a大于b"<<endl;
   }
   esle
   {
    cout<<"Line 3-a不大于b"<<endl;
   }
   a=5;
   b=20;
   if(a<=b)
   {
    cout<<"Line 4-a小于或等于b"<<endl;
   }
   if(b>=a)
   {
       cout<<"Line 5-b大于或等于a"<<endl;
   }
	return 0;
}