C++快速读写
oi
这个东西太常用了，单独贴出来吧。（虽然我个人认为这是玄学。）
别忘了 #include
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| #include<cstdio>
#include<cctype>
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| inline int read()
{
int X = 0, w = 0;
char ch = 0;
while (!isdigit(ch))
{
w |= ch == '-';
ch = getchar();
}
while (isdigit(ch))
X = (X << 3) + (X << 1) + (ch ^ 48), ch = getchar();
return w ? -X : X;
}
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| inline double dbread()
{
double X = 0, Y = 1.0;
int w = 0;
char ch = 0;
while (!isdigit(ch))
{
w |= ch == '-';
ch = getchar();
}
while (isdigit(ch))
X = X * 10 + (ch ^ 48), ch = getchar();
ch = getchar();
while (isdigit(ch))
X += (Y /= 10) * (ch ^ 48), ch = getchar();
return w ? -X : X;
}
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| inline void write(int x)
{
if (x < 0)
putchar('-'), x = -x;
if (x > 9)
write(x / 10);
putchar(x % 10 + '0');
}
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其实我更喜欢这样
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| ios::sync_with_stdio(false);
cin.tie(0);
|
