#include<iostream.h>
#include<stdio.h>
void main()
    {char ch;int n=0;
     cout<<"請(qǐng)輸入字符,用一或二回車鍵可得出結(jié)果."<<endl;
     do
      {do
         {ch=getchar(); 
         }while(!(ch>='a'&&ch<='z'||ch>='A'&&ch<='Z')&&ch!='\n');
       if(ch=='\n')n=n-1;
       do
         {ch=getchar();
         }while(ch>='a'&&ch<='z'||ch>='A'&&ch<='Z'||ch>='0'&&ch<='9'||ch=='_');
       n++;
       }while(ch!='\n');
     cout<<"word?="<<n<<endl;
     }