fread读入挂and普通读入挂and浮点数读入挂

fread读入挂

版本一
```
namespace fastIO {
#define BUF_SIZE 100000
//fread -> read
bool IOerror = 0;
inline char nc() {
static char buf[BUF_SIZE], *p1 = buf + BUF_SIZE, *pend = buf + BUF_SIZE;
if(p1 == pend) {
p1 = buf;
pend = buf + fread(buf, 1, BUF_SIZE, stdin);
if(pend == p1){
IOerror = 1;
return -1;
}
}
return *p1++;
}
inline bool blank(char ch) {
return ch == ' ' || ch == '\n' || ch == '\r' || ch == '\t';
}
template
inline void read(T &x) {
char ch;
while(blank(ch = nc()));
if(IOerror)
return;
for(x = ch - '0'; (ch = nc()) >= '0' && ch using namespace fastIO;

<br>
版本二

struct FastIO {

static const int S = 1e7;

int wpos;

char wbuf[S];

FastIO() : wpos(0) {}

inline int xchar() {

static char buf[S];

static int len = 0, pos = 0;

if (pos == len)

pos = 0, len = fread(buf, 1, S, stdin);

if (pos == len) exit(0);

return buf[pos++];

}

inline int xuint() {

int c = xchar(), x = 0;

while (c <= 32) c = xchar();

for (; '0' <= c && c <= '9'; c = xchar()) x = x * 10 + c - '0';

return x;

}

inline int xint() {

int s = 1, c = xchar(), x = 0;

while (c <= 32) c = xchar();

if (c == '-') s = -1, c = xchar();

for (; '0' <= c && c <= '9'; c = xchar()) x = x * 10 + c - '0';

return x * s;

}

inline void xstring(char *s) {

int c = xchar();

while (c <= 32) c = xchar();

for (; c > 32; c = xchar()) * s++ = c;

s = 0;

}

inline void wchar(int x) {

if (wpos == S) fwrite(wbuf, 1, S, stdout), wpos = 0;

wbuf[wpos++] = x;

}

inline void wint(LL x) {

if (x < 0) wchar('-'), x = -x;

char s[24];

int n = 0;

while (x || !n) s[n++] = '0' + x % 10, x /= 10;

while (n--) wchar(s[n]);

wchar('\n');

}

inline void wstring(const char s) {

while (s) wchar(s++);

}

~FastIO() {

if (wpos) fwrite(wbuf, 1, wpos, stdout), wpos = 0;

}

} io;

<br>
版本三

inline char nc(){

static char buf[100000],p1=buf,p2=buf;

return p1p2&&(p2=(p1=buf)+fread(buf,1,100000,stdin),p1p2)?EOF:p1++;

}

inline int _read(){

char ch=nc();int sum=0;

while(!(ch>='0'&&ch<='9'))ch=nc();

while(ch>='0'&&ch<='9')sum=sum10+ch-48,ch=nc();

return sum;

}

<br>

版本四

include

include

using namespace std;

const int maxx=40000008;

char Input[maxx+5],*ipos;

define read() (strtol(ipos,&ipos,10))

int main() {

fread(Input,maxx,1,stdin);ipos=Input;

int n=read();

//Do something......
return 0;

}

<br>
版本五

const int STRSIZE=int(4e7);

char in1[STRSIZE];

char in=in1, tempend;

void Input() {

tempend=in+STRSIZE;

fread(in,1,STRSIZE,stdin);

}

inline void scan(int &x) {

char c=(in++);

while(!(c>='0' && c<='9')) c=(in++);

x=c-'0';

c=(in++);

while(c>='0' && c<='9') {

x=x10+c-'0';

c=*(in++);

}

}

<br>
版本六

const int BufferSize=1<<16;

char buffer[BufferSize],head,tail;

inline char Getchar() {

if(headtail) {

int l=fread(buffer,1,BufferSize,stdin);

tail=(head=buffer)+l;

}

return *head++;

}

inline int read() {

int x=0,f=1;char c=Getchar();

for(;!isdigit(c);c=Getchar()) if(c'-') f=-1;

for(;isdigit(c);c=Getchar()) x=x10+c-'0';

return xf;

}

inline void write(int x){

if(x>=10)write(x/10);

putchar(x%10+'0');

}

<br>
版本七

namespace IO {

const int MX = 4e7; //1e7占用内存11000kb

char buf[MX]; int c, sz;

void begin() {

c = 0;

sz = fread(buf, 1, MX, stdin);

}

inline bool read(int &t) {

while(c < sz && buf[c] != '-' && (buf[c] < '0' || buf[c] > '9')) c++;

if(c >= sz) return false;

bool flag = 0; if(buf[c] == '-') flag = 1, c++;

for(t = 0; c < sz && '0' <= buf[c] && buf[c] <= '9'; c++) t = t * 10 + buf[c] - '0';

if(flag) t = -t;

return true;

}

}

<br>
版本八

struct FastIO {

static const int S = 100 << 1;

int wpos;

char wbuf[S];

FastIO() : wpos(0) {}

inline int xchar() {

static char buf[S];

static int len = 0, pos = 0;

if (pos == len) {

pos = 0;

len = (int)fread(buf, 1, S, stdin);

}

if (pos == len) {

return -1;

}

return buf[pos++];

}

inline int xint() {

int s = 1, c = xchar(), x = 0;

while (c <= 32) {

c = xchar();

}

if (c == '-') {

s = -1;

c = xchar();

}

for (; '0' <= c && c <= '9'; c = xchar()) {

x = x * 10 + c - '0';

}

return x * s;

}

~FastIO() {

if (wpos) {

fwrite(wbuf, 1, wpos, stdout);

wpos = 0;

}

}

} io;

<br>
版本九：

namespace fastio{

int ptr, ye, Siz;

char temp[25], str[8333667], out[8333669];

void io_init(){

ptr = 0, ye = 0;

Siz = fread(str, 1, 8333667, stdin);

}

inline int read(){

int i, j, val = 0, fla = 1;

while (ptr<Siz&&(str[ptr] < 48 || str[ptr] > 57)) ptr++;

if(ptr>=Siz)return -1;

while (str[ptr] > 47 && str[ptr] < 58) fla = 0,val = (val * 10) + (str[ptr++] - 48);

if(fla)return -1;

return val;

}

inline void convert(long long x,bool flag){

int i, d = 0;

for (;