main.c

#include <stdio.h>
#include <string.h>
#include "split.h"

int main(void)
{
  char string[20] = "my name is satheesh";
  SPLIT_RESULT splited_result = split(string, ' ');
  print_split_array(splited_result);
  return 0;
}

split.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "split.h"

int min(int a, int b)
{
  return a < b ? a : b;
}

int max(int a, int b)
{
  return a > b ? a : b;
}

const char* substring(const char string[], int limit_1, int limit_2)
{
  int low = min(limit_1, limit_2);
  int high = min(max(limit_1, limit_2), strlen(string));
  char *result = malloc(high - low);
  int char_position = 0;
  for (int index = low; index < high; index++)
  {
    result[char_position] = string[index];
    char_position++;
  }
  return result;
}

SPLIT_RESULT split(char string[], char limiter)
{
  int length = strlen(string);
  SPLIT_RESULT splited_words = {0, malloc(length)};

  string[length] = limiter;
  int break_point = 0, words_count = 0;
  for (int index = 0; index < length + 1; index++)
  {
    if (string[index] == limiter)
    {
      splited_words.words[words_count] = substring(string, break_point, index);
      break_point = index + 1;
      words_count++;
      splited_words.length++;
    }
  }
  return splited_words;
}

void print_split_array(SPLIT_RESULT splited_result)
{
  for (int index = 0; index < splited_result.length; index++)
  {
    printf("%s\n", splited_result.words[index]);
  }
}

split.h

typedef struct {
  int length;
  const char** words;
} SPLIT_RESULT;

int min(int, int);
int max(int, int);
const char* substring(const char string[], int, int);
SPLIT_RESULT split(char string[], char);
void print_split_array(SPLIT_RESULT);