快速读入模板

 1 inline int read(int &x)
 2 {
 3     int k=0;
 4     char f=1;
 5     char c=getchar();
 6     while(c>'9'||c<'0')
 7         if(c=='-')
 8         {
 9             f=-1;
10             c=getchar();
11         }
12     while(c<='9'&&c>='0')
13     {
14         k=k*10+c-'0';
15         c=getchar();
16     }
17     x = k*f;
18 }
原文地址:https://www.cnblogs.com/Jadon97/p/8126421.html