xmu 1015.AntiCAPS

这个题目自己写了三份代码,开始两份都不能AC，始终有点小问题。
后来看了一位老兄的评论，用状态输入，感觉大受启发，写出了代码，提交就AC了，比较简单～～

#include<iostream>
#include<cstdlib>

using namespace std ;

int main()
{
    char temp ;
    int flag = 1 ;
    while(scanf("%c",&temp)!=EOF)
   {
      if(flag == 1 )
      {
              if(temp>='A'&&temp<='Z')
              {
                 printf("%c",temp);
                 flag = 0 ;
              }
              else printf("%c",temp);
      }
      else
     {
             if(temp>='A'&&temp<='Z')
                 printf("%c",temp+32);
             else if(temp=='.'||temp=='?'||temp=='!')
                 {
                    printf("%c",temp);
                    flag =1 ;
                 }
                 else printf("%c",temp);
     }
   }
   system("pause");
   return 0 ;
}