숫자를 한글로 변환

#include <stdio.h>
#include <string.h>
int i, j, a = 0, k, l;
char str1[100];
int view() {
  switch (l) {
  case 1:
    printf("만");
    break;
  case 2:
    printf("억");
    break;
  case 3:
    printf("조");
    break;
  case 4:
    printf("경");
    break;
  case 5:
    printf("해");
    break;
  case 6:
    printf("자");
    break;
  case 7:
    printf("양");
    break;
  case 8:
    printf("구(32자리수)");
    break;
  case 9:
    printf("간");
    break;
  case 10:
    printf("정");
    break;
  }
  a = 0;
  return 0;
}
int main() {
  scanf("%s", str1);
  if (strlen(str1) == 1 && str1[i] - 48 == 0) {
    printf("영");
    return 0;
  }
  for (i = 0; i < strlen(str1); i++) {
    j = str1[i] - 48;
    switch (j) {
    case 1:
      printf("일");
      break;
    case 2:
      printf("이");
      break;
    case 3:
      printf("삼");
      break;
    case 4:
      printf("사");
      break;
    case 5:
      printf("오");
      break;
    case 6:
      printf("육");
      break;
    case 7:
      printf("칠");
      break;
    case 8:
      printf("팔");
      break;
    case 9:
      printf("구");
      break;
    }
    k = (strlen(str1) - i - 1) % 4;
    if (j != 0) {
      a = 1;
      if (k == 3)
        printf("천");
      else if (k == 2)
        printf("백");
      else if (k == 1)
        printf("십");
    }
    if (a == 1) {
      l = (strlen(str1) - i - 1) / 4;
      if (k == 0)
        view();
    }
  }
  return 0;
}