【zz】输出1,2,...,100,99,...,2,1

www.cppblog.com/shifan3/archive/2007/11/02/35767.html

输出1,2,…,100,99,…,2,1
短路算法和逗号表达式粉墨登场了，一行搞定~

#include <cstdio>

void f(int i,int n)
{
     printf("%dn",i),(i<n)&&(f(i+1,n),printf("%dn",i));
}

int main()
{
     f(1,100);
}