C++快速读入

namespace IO
{
    inline char nc() {
        static char buf[100000], *p1 = buf, *p2 = buf;
        return p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 100000, stdin), p1 == p2) ? EOF : *p1++;
    }
    template<typename T>
    inline T read() {
        char ch = nc(); 
        T sum = 0;
        while (!(ch >= '0'&&ch <= '9'))
        {
            ch = nc();
            if (ch == EOF)  return EOF;
        }
        while (ch >= '0'&&ch <= '9')
        {
            sum = sum * 10 + ch - 48;
            ch = nc();
            if (ch == EOF)  return EOF;
        }
        return sum;
    }
}

调用方式
int n = IO::read<int>();
long long n = IO::read<long long>();
判断EOF
while((n = IO::read<int>()) != EOF)