C-Program to Count number of vowels in a string

#include<stdio.h>

int main()

{

 char s[100];

 int i,count=0;

 printf("Enter a string to know how many vowels are there \n");

 scanf("%s",&s);

 for(i=0;s[i]!='\0';i++)

 {

   if(s[i]=='A'||s[i]=='a'||s[i]=='e'||s[i]=='E'||s[i]=='I'||s[i]=='i'||s[i]=='O'||s[i]=='o'||s[i]=='U'||s[i]=='u')

   {

     count++;

   }

 }

 if(count==0)

 {

    printf("No vowels are there \n");

 }

 else

 {

    printf("Number of vowels in %s is %d\n",s,count);

 }

return 0;

}