21天学通c++之7.11 for循环之空语句

#include <iostream>
using namespace std;
int main()
{ 
 int counter=0;
 for(;counter<5;)//等同 for(counter=0;counter<5;counter++)
 {
 counter++;
 cout<<"looping\n";
 }
 cout<<"counter: "<<counter;
 return 0;
}