No. of vowels, digits, spaces & consonants in a String

#include<stdio.h>
#include<conio.h>
void main()
{ char line[150];
int i,v,c,d,s;
clrscr();
v=c=d=s=0;
printf("\n\n program to find vowels,consonants,digits,spaces in a line");
printf("\n Enter a line of string : \n ");
gets(line);
for(i=0;line[i]!='\0';i++)
{ if(line[i]=='a' || line[i]=='e' || line[i]=='i' || line[i]=='o' || line[i]=='u')
v++;
else if(line[i]=='A' || line[i]=='E' || line[i]=='I' || line[i]=='O' || line[i]=='U')
v++;
else if((line[i]>='a'&& line[i]<='z') || (line[i]>='A'&& line[i]<='Z'))
c++;
else if(line[i]>='0'&&c<='9')
d++;
else if (line[i]==' ')
s++;
}
printf("\n Vowels: %d",v);
printf("\n Consonants: %d",c);
printf("\n Digits: %d",d);
printf("\n White spaces: %d",s);
getch();
}