Split a string (char*) by a character in C/C++

split_string.c

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

void string_split(char * string, char sep, char *** r_array_string, int * r_size) {
	int i, k, len, size;
	char ** array_string;
	
	// Number of substrings
	size = 1, len = strlen(string);
	for(i = 0; i < len; i++) {
		if(string[i] == sep) {
			size++;
		}
	}
	
	array_string = malloc(size * sizeof(char*));
	
	i=0, k=0;
	array_string[k++] = string; // Save the first substring pointer
	// Split 'string' into substrings with \0 character
	while(k < size) {
		if(string[i++] == sep) {
			string[i-1] = '\0'; // Set end of substring
			array_string[k++] = (string+i); // Save the next substring pointer
		}
	}
	*r_array_string = array_string;
	*r_size = size;
	return;
}


int main() {
	char string[] = "parse,this,string,with,the,comma,separator";
	char ** array_string;
	int i, size;
	
	string_split(string, ',', &array_string, &size);
	
	printf("Number of substrings: %d \n", size);
	for(i = 0; i < size; i++) {
		printf("%d: %s \n", i, array_string[i]);
	}
	
	free(array_string);
	
	return EXIT_SUCCESS;
}