Back To C Single Dimensional Arrays Index

//program to input a string and find number of vowels,consonants,digits and other characters
#include<conio.h>
#include<string.h>
#include<stdio.h>
void main()
{
    
    char str[20];
    char ch;
    int i,len;
    int vowels=0,cons=0;
    int digits=0,other=0;
    int v=0;
    clrscr();
    printf("\nenter a string");
    gets(str);
    len=strlen(str);
    for(i=0;i<len;i++)
    {
        ch=str[i];
        v=0;
        if((ch=='a') || (ch=='e') || (ch=='i') ||(ch=='o') ||(ch=='u'))
        {
            vowels++;
            v=1;
        }
        else if ((ch=='A') || (ch=='E') || (ch=='I') ||(ch=='O') ||(ch=='U'))
        {
            vowels++;
            v=1;
        }
        else if((v==0) && (ch>='a') && (ch<='z'))
        {
            cons++;
        }
        else if((v==0) && (ch>='A') && (ch<='Z'))
        {
            cons++;
        }
        else
        if((ch>='0') && (ch<='9'))
        {
            digits++;
        }
        else
        {
            other++;
        }
    }
    printf("\nnumber of vowels are %d",vowels);
    printf("\nnumber of consonants are %d",cons);
    printf("\ndigits are %d",digits);
    printf("\nother are %d",other);
    getch();
}