#include<stdio.h>
#include<string.h>
int main()
{char a[80],i,len;
gets(a);
len=strlen(a);
for(i=0;i<len;i++)
{if(a[i]>='a'&&a[i]<='z'||a[i]>='A'&&a[i]<='Z')printf("%c",a[i]);
}
return 0;
}
标签:return,int,11.21,len,&&,include From: https://blog.51cto.com/u_15758636/5874085