输出:每两组数据之间空一行

每两组数据之间空一行:

long count=-1;

while (xx)

{

  count=count+1;

  if (count)

    printf(" ");

}

bool vis=false;

while (xx)

{

  if (vis)

    printf(" ");

  vis=true;

}

原文地址:https://www.cnblogs.com/cmyg/p/7230587.html