// the main program taken from the test thread by walt..modified with the header


#include <stdio.h>
#include "mygets1.h"

int main()
{
    char  b1[] = "ABCD";
    char  b2[] = "LMNO";
    char  b3[] = "ZYXW";
    
    puts(b1);
    puts(b2);
    puts(b3);
    putchar('\n');
    
    puts("Enter some characters:");
    mygets(b2);

    putchar('\n');
    puts(b1);
    puts(b2);
    puts(b3);
    
    return(0);
}

//mygets1.h - - -  my gets function 

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

char* mygets(char str[]); //func prototype

char* mygets(char str[])

{
    //    char *str;
    unsigned int i = 0;
    int bffr_fl = 1; //flag to check the if user input exceeds 4 chars
    int mul_factor = 1; //how many 16-char wide chunks do we need?
    int tmp; //holder for the multiplication (see below)
    size_t sze = strlen(str);

    while ((str[i] = getchar()) != '\n'){
        i++;
        if(i >= sze && bffr_fl) {
                str = realloc(str,16*sizeof(char));//increase the size to 16
                bffr_fl = 0;
                mul_factor++;
        }
        else if(i % 16 == 0) {
           tmp = 16*mul_factor;         
-->       str = realloc(str,tmp*sizeof(char));//add another 16-wide chunk  to the tail
            mul_factor++;
        }
    }
    printf("the user pressed enter at position number %d\n",i);
    str[i] = '\0'; //append a trailing null after the last char
    return str;
}

// Note: Calling function must free memory
char* mygets()
{ char *result = NULL;
  
  //result = (char*)realloc()....do whatever you would do here

  // return result;
}


int main()
{ char *line = mygets();
  
  // do what you need to do with the line
  
  // free the line
  free(line);

  return 0;
}