Word, Vowels, Constant and char Counter

#include <stdio.h>
#include <stdlib.h>
int main () {

    int nv,nc,nw,ns,nchar,i;
    nv=nc=nw=ns=nchar=0;
    char c[50];
    puts("Enter any String");
    gets(c);

        for(i=0;c[i]!='\0';i++){

            if( c[i]=='a'||
                c[i]=='e'||
                c[i]=='i'||
                c[i]=='o'||
                c[i]=='u'||
                c[i]=='A'||
                c[i]=='E'||
                c[i]=='I'||
                c[i]=='O'||
                c[i]=='U'
              )
              {
                nv++;
              }
            else if (c[i]==' '){
                ns++;
            }
            else if (c[i]>=65 && c[i]<=90 ||
                     c[i]>=97 && c[i]<=122
                    ){
                nc++;
            }
            nchar = nv+nc;
            nw = ns+1;
        }
        if (strlen(c)>50){
            system("cls");
            puts("String was Too Large Only 50 Charecters Allowed");
        }
        else {
        system("cls");
    printf("\nNo. of Words = %d\nNo. of Vowels = %d\nNo. of Consonant = %d\nNo. of Space(s) = %d", nw,nv,nc,ns);
    printf("\nNo. of Charecters = %d (No Space Count)", nchar);
}

getch();
return 0;
}