C 语言简历一个文件夹 并自己输入字符 来取文件夹名字

int main(void)

{
FILE *fp;
char ch,filename[10];
scanf("%s",filename);
if((fp=fopen(filename,"w"))==NULL)
{
printf("cannot open file ");
exit(0);

}
ch=getchar();
ch=getchar();
while(ch!='#')
{
fputc(ch,fp);putchar(ch);
ch=getchar();
}

fclose(fp);

return 0;
}