제가 하면서 한 3가지 경우로 만들어 봤는데...뭐가 잘못됬는지...고수분들의 조언 부탁 드립니다...

맨첫번째가..

#include <stdio.h>
#include <ctype.h>
void main(void)
{char character[50];
void find_x(char[]);
printf("type a sentance: ");
gets(character);
find_x(character);
}

void find_x(char character[])
{
  int blank=0,alpha=0,digit=0,other=0;
  while ((char)character!='\n')
  {
    if ((char) character==' ')
    ++blank;
    else if (isalpha((char)character))
    ++alpha;
    else if (isdigit((char)character))
    ++digit;
    else
    ++other;
  }
  printf("알파벳:%s 숫자:%s 그외%s",alpha,digit,other+blank);
}

두번째가
#include <stdio.h>
#include <ctype.h>
void main(void)
{char character[50];
void find_x(char[]);
printf("type a sentance: ");
gets(character);
find_x(character);
}

void find_x(char character[])
{
  int c,blank=0,alpha=0,digit=0,other=0;
  while ((c=getchar())!='\o')
    if ((char) c==' ')
    ++blank;
    else if (isalpha(c))
    ++alpha;
    else if (isdigit(c))
    ++digit;
    else
    ++other;

  printf("알파벳:%s 숫자:%s 그외",alpha,digit,other+blank);
}

마지막으로...
#include <stdio.h>
#include <ctype.h>
void main(void)
{char character[50];
void find_x(char[]);
printf("type a sentance: ");
gets(character);
find_x(character);
}

void find_x(char character[])
{
  int i,c,blank=0,alpha=0,digit=0,other=0;
  while(character[i]!='\o')
  {
    for (i=0;i<50;++i)
    {
    if (character[i]==' ')
    ++blank;
    else if (isalpha(character[i]))
    ++alpha;
    else if (isdigit(character[i]))
    ++digit;
    else
    ++other;
    }

  }
printf("알파벳:%s 숫자:%s 그외",alpha,digit,other+blank);
}

먼가 쉬운것이 잘못된거 같은데 잘모르겠네요...좀 허접 하더라도 양해 부탁 드립니다...