C++超级快读快写2.3

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最新推荐文章于 2025-06-10 22:12:04 发布 · 649 阅读

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#c++ #cocoa #开发语言

#ifndef VERY_FAST_IO3
#define VERY_FAST_IO3
#include <unistd.h>
#include<bits/stdc++.h>
 
namespace MTL{
   
   
	using namespace std;
	//getchar_unlocked/putchar_unlocked貌似快一点？ 
	#define likely(x) __builtin_expect(!!(x), 1)
	#define unlikely(x) __builtin_expect(!!(x), 0)
	class fast_ios{
   
   //out普通操作0~9,in普通操作10~19,格式操作30~39,流修改50~59 
		long long Key_,seting;
		public:
			fast_ios(long long k,long long setin=0){
   
   
				Key_=k;seting=setin;
			}
			friend fast_ios operator|(fast_ios a,fast_ios b);
			long long operator&(long long b){
   
   
				return Key_&b;
			}
			long long get_seting(){
   
   return seting;}
	}; 
	fast_ios operator|(fast_ios a,fast_ios b){
   
   
		return fast_ios(a.Key_|b.Key_);
	}
	namespace fast_ios_base{
   
   
		const fast_ios fast_ends(1ll),fast_flush(1ll<<1),fast_endl(3ll),fast_lock(1ll<<50),fast_unlock(1ll<<51),fast_ws(1<<10),fast_out(1<<9),fast_in(1<<19),fast_append((1<<8)|(1<<9));
	} 
	const fast_ios fast_setf(long long k){
   
   //设置double精度 
		return fast_ios(1ll<<30,k);
	}
	namespace const_val{
   
   
		const long long buf_len=998732;
		//const long long buf_len=1<<16;
		//const long long fast_ios_len=2;//fast_ios的有效位数 
	}
	class fast_io{
   
   
		#define buf_len const_val::buf_len
		bool is_lock=1;
		char buf_i[buf_len],buf_o[buf_len];
		long long in_i=0,out_i=0,double_out_len=9;
		bool IO_OK=1;
		double double_out_min=1E-10,double_out_mlen=100000000;
		FILE *fastin=NULL,*fastout=NULL;
		public:
			fast_io(){
   
   
				fastin=stdin,fastout=stdout;
				in_i=buf_len;
				
			}
			fast_io(string file_name,fast_ios f=fast_ios((1<<9)|(1<<19))){
   
   
				if(f&(1<<9)){
   
   
					if(f&(1<<8))fastout=fopen((file_name+string(".out")).c_str(),"ab");
					else fastout=fopen((file_name+string(".out")).c_str(),"wb");
				}
				if(f&