快读
0AND1STORY
2019-01-25 11:05:23
今天写了一个不错的快读，跟大家分享。
废话不多说，代码如下：
```cpp
#ifndef _FASTIO_H_
#define _FASTIO_H_
#include <cstdio>
#include <cctype>
namespace fastio {
class FastIn {
public:
template<typename T>
inline void readSingle(T& x) {
x = 0;
int f = 1;
char ch = getchar();
while (!isdigit(ch) && ch != '-')
ch = getchar();
if (ch == '-')
f = -1,
ch = getchar();
while (isdigit(ch))
x = x * 10 + ch - '0',
ch = getchar();
x *= f;
}
template<typename T>
FastIn& operator>>(T& x) {
readSingle(x);
return *this;
}
};
FastIn fastin;
}
#endif
```
使用方法如下：
```cpp
#include <cstdio>
#include "fastio.h"
using namespace std;
int main()
{
int a, b, c;
fastio::fastin >> a >> b >> c;
//可使用using namespace fastio;
//然后用fastin >> a >> b >> c;
printf("%d %d %d\n", a, b, c);
return 0;
}
```