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fast_print.cpp
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fast_print.cpp
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#include <cstdio>
#include <cmath>
#include <string>
#include <iostream>
#define THRESHOLD 1E-8
using std::string;
char buf[10000000], pbuf[10000000], *p = pbuf, *s = buf, *t = buf;
#define putchar(ch) (p - pbuf == 10000000 ? fwrite(pbuf, 1, 10000000, stdout), p = pbuf, *p++ = ch : *p++ = ch)
void printInt(int x)
{
if (x < 0) putchar('-');
x = abs(x);
if (x > 9) printInt(x / 10);
putchar(x % 10 + '0'); // 输出最高位数字(base case)
}
void printLL(long long x)
{
if (x < 0) putchar('-');
x = abs(x);
if (x > 9) printLL(x / 10);
putchar(x % 10 + '0'); // 输出最高位数字(base case)
}
void printFloatIRec(long long x, int d, bool pure_int)
{
if (x > 9) printFloatIRec(x / 10, d - 1, pure_int);
if (d == 1 && pure_int == false) putchar('.');
putchar(x % 10 + '0'); // 输出最高位数字
}
void printFloat(float x)
{
int d = 0;
if (x < 0) putchar('-');
x = abs(x);
while (x - (long long)x > THRESHOLD)
{
x *= 10;
d++;
}
printFloatIRec((long long) x, d, d == 0);
}
void printFloat(float x, int d)
{
if (x < 0) putchar('-');
x = abs(x);
for (int i = d; i > 0; i--) x *= 10;
printFloatIRec((long long) x, d, d == 0);
}
void printDoubleIRec(long long x, int d, bool pure_int)
{
if (x > 9) printDoubleIRec(x / 10, d - 1, pure_int);
if (d == 1 && pure_int == false) putchar('.');
putchar(x % 10 + '0'); // 输出最高位数字
}
void printDouble(double x)
{
int d = 0;
if (x < 0) putchar('-');
x = abs(x);
while (x - (long long) x > THRESHOLD)
{
x *= 10;
d++;
}
printDoubleIRec((long long) x, d, d == 0);
}
void printDouble(double x, int d)
{
if (x < 0) putchar('-');
x = abs(x);
for (int i = d; i > 0; i--) x *= 10;
printDoubleIRec((long long) x, d, d == 0);
}
void printChar(char x)
{
putchar(x);
}
void printCharArray(char *x)
{
for (int i = 0; x[i] != '\0'; i++)
putchar(x[i]);
}
void printString(string& x)
{
for (int i = 0; x[i] != '\0'; i++)
putchar(x[i]);
}
int main()
{
return 0;
}