Switch Case Range

#include<stdio.h>

int main()
{
    char  alpha;

    printf("Enter the char: ");
    scanf("%c", &alpha);

    switch(alpha)
    {

    case 'A' ... 'Z':
        printf("Capital Letter");
        break;

    case 'a' ... 'z':
        printf("Small Letter");
        break;

    case '0' ... '9':
        printf("Digits");
        break;

    default:
        printf("Wrong Input");
    }

    return 0;
}