8-15.cpp

为C++学习者

#include<iostream.h>
#include<string.h>
class output
{
  static char outbuf[255];        //用作资源共享的输出缓冲区
  static int inuse;               //当inuse为0时，缓冲区可以使用，否则不能使用
  static int oindex;              //数组outbuf的下标
  char str[80];
  int i;
  int who;
public:
  output(int w,char *s)
  {
    strcpy(str,s);
	i=0;
	who=w;
  }
  int putbuf()
  {
    if(!str[i])
	{
	  inuse=0;
	  return 0;
    }
	if(! inuse)inuse=who;
	if(inuse!=who)return-1;
	if(str[i])
	{
	  outbuf[oindex]=str[i];
	  i++;
	  oindex++;
	  outbuf[oindex]='\0';
	  return 1;
	}
  }
  void show()
  {
    cout<<outbuf<<'\n';}
};
char output::outbuf[255];
int output::inuse=0;
int output::oindex;
main()
{
  output o1(1,"This is a test"),o2(2,"of statics.");
  while(o1.putbuf()|o2.putbuf());
  o1.show();
  return 0;
}