void DoiChu(char s[])
{
	strlwr(s);
	int n=strlen(s);
	for(int i=0;i<n;i++)
	{
		if(s[0]>=97&&s[0]<=122)
			s[0]=s[0]-32;
		if(s[i]==' ')
			if(s[i+1]>=97&&s[i+1]<=122)
				s[i+1]=s[i+1]-32;
	}
}