fread和fwrite快读快写是需要文件输入输出还是标准输入输出也能用？我的代码无法在标准输入输出中使用，求调

namespace IO{
	char buf[1<<20],pbuf[1<<20],*pp=pbuf,*p1,*p2;
	#define gc() (p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<20,stdin),p1==p2)?EOF:*p1++)
	template<typename T>
	inline void read(T&x){
		x=0;register char c=gc();register T f=1;
		while(c<'0'||c>'9'){if(c=='-')f=-1;c=gc();}
		while(c>='0'&&c<='9'){x=(x<<3)+(x<<1)+(c^48);c=gc();}x*=f;
	}template<typename T,typename... Args>
	inline void read(T &x, Args &... args){read(x);read(args...);}
	inline void pc(const char&c) {
		if(pp-pbuf==1<<20)fwrite(pbuf,1,1<<20,stdout),pp=pbuf;
		*pp++=c;
	}inline void write(int x){
		static int sta[35];
		register int top=0;
		do{sta[top++]=x%10,x/=10;}while(x);
		while(top)pc(sta[--top]+'0');
	}using namespace std;
}using namespace IO;