#include
void main() { FILE *fp; char str1[80],str2[80],*p,*q;
gets(str1); p=q=str1;
while ( *p ) {
if ( *p=='!' ) break;
if ( *p>='a' && *p<='z' ) { *q=*p; q++; }
p++;
}
*q=0;
if ( fp=fopen("D:\\fie.txt","w+") ) {
fprintf(fp,"%s\n",str1); fclose(fp);
if ( fp=fopen("D:\\fie.txt","r") ) {
fscanf(fp,"%s",str2); fclose(fp); printf("%s\n",str2);
} else printf("无法打开文件读取。\n");
} else printf("无法建立文件。\n");
}