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      //适用于正负整数
     
    
   

    

     

    
    

     

      template <class T>
     
    
   

    

     

    
    

     

      inline bool scan_d(T &ret)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 char c; int sgn;
     
    
   

    

     

    
    

     
 if(c=getchar(),c==EOF) return 0; //EOF
     
    
   

    

     

    
    

     
 while(c!='−'&&(c<'0'||c>'9')) c=getchar();
     
    
   

    

     

    
    

     

       sgn=(c=='−')?−1:1;
     
    
   

    

     

    
    

     

       ret=(c=='−')?0:(c−'0');
     
    
   

    

     

    
    

     
 while(c=getchar(),c>='0'&&c<='9') ret=ret*10+(c−'0');
     
    
   

    

     

    
    

     

       ret*=sgn;
     
    
   

    

     

    
    

     
 return 1;
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     

      inline void out(int x)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 if(x>9) out(x/10);
     
    
   

    

     

    
    

     
 putchar(x%10+'0');
     
    
   

    

     

    
    

     

      }
     
    
  
 

  

   

    

     

    
    

     

      //正负数
     
    
   

    

     

    
    

     

      template <class T>
     
    
   

    

     

    
    

     

      bool scan_d(T &ret)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 char c; 
     
    
   

    

     

    
    

     
 int sgn; 
     
    
   

    

     

    
    

     

       T bit = 0.1;
     
    
   

    

     

    
    

     
 if (c=getchar(), c==EOF) 
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     
 return 0;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 while (c! = '-' && c != '.' && (c < '0' || c > '9')) 
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       c = getchar();
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       sgn = (c == '-') ? -1 : 1;
     
    
   

    

     

    
    

     

       ret = (c == '-') ? 0 : (c - '0');
     
    
   

    

     

    
    

     
 while (c = getchar(), c >= '0' && c <= '9')
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       ret = ret * 10 + (c - '0');
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 if (c == ' ' || c == '\n')
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       ret *= sgn;
     
    
   

    

     

    
    

     
 return 1;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 while (c = getchar(), c >= '0' && c <= '9')
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       ret += (c - '0') * bit, bit /= 10;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       ret *= sgn;
     
    
   

    

     

    
    

     
 return 1;
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      template <class T>
     
    
   

    

     

    
    

     

      inline void print_d(int x)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 if (x > 9)
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       print_d(x / 10);
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 putchar(x % 10 + '0');
     
    
   

    

     

    
    

     

      }
     
    
  
 

文章来源: fantianzuo.blog.csdn.net，作者：兔老大RabbitMQ，版权归原作者所有，如需转载，请联系作者。

原文链接：fantianzuo.blog.csdn.net/article/details/81814485