#include #define N 9999 void main(){char s[N];int i;printf("请输入一个英语句子：\n");gets(s);for(i=0;s[i]!='\0';i++)if((s[i]>='a'&&s[i]<='z')||(s[i]>='A'&&s[i]<='Z'))putchar(s[i]);elseprintf("\n");}
