to read large text files with multiple strings in ANSI C

#include <stdlib.h>
#include <stdio.h>
#include <string.h> /* for strlen(...) */

/** =>Read in data VDe. from  20460000.txt line by line
    =>Store each line in a VDe_String (Special variable of typedef for char strings
    =>Create a new dynamically allocated char_array and read the lines into it
      and dsiplay **/


	typedef char* VDe_String; /* VDe_String is type 'pointer to char' ... */

	/* returns NULL for EOF ... or a pointer to a NEW VDe_String ... */

	VDe_String readLine(FILE* f)

	{
	    static int ch = 0; /* static in ch ... to remember if a previous call set EOF */
	    static int line_Count = 0; /* if file empty then control comes to line_Count */
	    int Buffer_Size = 256; /* adjust 255 for data,cab be different */
	    int i = 0;   /* index parameter need in main*/

	    if(ch == EOF) {ch=0; line_Count=0; return NULL;} /* reset for read again */

	    VDe_String line = (VDe_String) calloc(Buffer_Size, sizeof(char));

	    while ((ch = fgetc(f)) != EOF && ch != '\n') /* if static ch not EOF & ch not line feed both true */

	    {
	        if(i >= Buffer_Size)
	        {
	            Buffer_Size += 256; /* adjust 256 for data */

	            line = (VDe_String) realloc(line, Buffer_Size*sizeof(char));
	        }

	        line[i++] = ch;
	    }

	    /* In case if file empty! ...*/

	    if(line_Count++ == 0 && ch == EOF) {free(line); return NULL;}

	    line[i] = '\0'; /* confirm terminal of line by '\0' */

	    return realloc(line, i+1); /* total len =  last index i ... + 1 more */
	}

	int main()

	{
	    VDe_String cs, *cs_arry;

	    int i=0, j=0; /* index for pointer */

	    FILE * fp;

	    fp = fopen("D:\\sspp.txt", "r");

	    if( fp == NULL )
	    {
	        printf("error opening file. press 'Enter' key to exit ... ");

	        getchar();

	        return 1;
	    }

	    puts("counting lines of text and showing each line ...");

	    while( (cs = readLine( fp )) )

	    {
	        ++i;
	        printf("%d: %s\n", i, cs);
	        free(cs);
	    }

	    rewind( fp );

	    /* reserve sufficent memory for an array of pointers to VDe_String ... */

	    cs_arry = (VDe_String*) malloc( i*sizeof(VDe_String) );

	    /* read the file into the array of VDe_String ... */

	    while( (cs = readLine( fp )) )

	        cs_arry[j++] = cs;

	    fclose(fp);

      	    if( i != j )

	        printf("\nError reading file i=%d, but j=%d\n", i, j );


	    puts("displaying array of strings...");

	    //break; // would not work

	    for( j=0; j<i; ++j)
	    {
	        printf("%d: %s\n", j+1, cs_arry[j]);

	        free( cs_arry[j] ); /* free memory reserved for each VDe_String when done with it */
	    }
	    free( cs_arry ); /* free memory reservered for the array when done with it */

	    printf("Press 'Enter' to continue ...");

	    getchar();

	    return 0;
}