Space and other character does gets counted

Question

Every single time I run this program I get the number of vowels and consonants only gets counted the number of spaces and any other special characters are not counted I can't seem to figure out what is wrong in my code. Does anybody have the solution to this?

void vowel_consonant(char *c)
    {
    int i,vcount,ccount,scount,ocount;
    vcount=ccount=scount=ocount=0;
    
    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'))
            vcount++;
        else if((c[i]>=65 || c[i]<=90) && (c[i]>=97 || c[i]<=122))
            ccount++;
        else if(c[i]==' ')
            scount++;
        else
            ocount++;
    
    }
    cout<<"Number of vowels:"<<vcount<<endl;
    cout<<"Number of consonant:"<<ccount<<endl;
    cout<<"Number of space:"<<scount<<endl;
    cout<<"Number of extra:"<<ocount<<endl;
    }