int main(void){FILE fp = NULL;char buf[1024]= {0};char p = buf;fp = fopen("./tt","r+");//注：知当前目录下道的版tt文件已存在权if(NULL == fp){return 0;}fseek(fp,0,SEEK_SET);while(1 == fscanf(fp,"%s",p)){p = buf + strlen(buf);*p++ = '$';}printf...