hello everybody. if some of you have seen some of my posts, you'll know that i'm making an ecosystem simulation. it includes three animals, with a ?/? chance that an animal will be created or destroyed. the information is outputed to a log which i then analyze to see any patterns....(lol, aren't i nerd ). two problems:

1. after the first animal, logs are created, but there is nothing in them....?!?!

2. after the third animal creation (carnivore creation), the program ternimates...!?!!?

i started c and C++ about two weeks ago, and i have learned a ton of stuff over that time, but seeing as even people that ahve been programming for years have problems, i will have to say i'm quite a newbie. i've looked quite a bit, but i can't find anything wrong with the code. please help:

thanks in advance,Code:#include <stdio.h> #include <stdlib.h> #include <time.h> int main () { float numerator; float denominator; int interval; int created = 0; int total = 0; int end; int sample; FILE *fp; srand (time(0)); printf("Welcome to Eco-Sim!\n"); printf("Version 1.00\n"); printf("By Jack Olszewski\n"); printf("\n"); printf ("Time (1 = 1 Year):"); scanf ("%d", &end); printf("\n\n"); printf("Plant:\n"); printf("\n"); printf ("Enter the Numerator for Creation: "); scanf ("%f", &numerator); printf ("Enter the Denominator for Creation: "); scanf ("%f", &denominator); printf ("\nProbability Of Creation Is: %f\n", numerator/denominator); interval = (int)((numerator/denominator)*RAND_MAX); if ((fp = fopen ("plantcreation.txt", "w")) == NULL) { printf ("\nError: Unable to open file"); return 1; } end = end + time (0); while (time (0) < end) { sample = rand (); fprintf(fp,"Plant Creation Log"); fprintf (fp, "Day: %d\t", total); if (sample < interval) { fprintf (fp, "Created\n\n"); created++; } else fprintf (fp, "Not Created\n\n"); total++; } printf("\n"); printf ("Enter the Numerator for Destruction: "); scanf ("%f", &numerator); printf ("Enter the Denominator for Destruction: "); scanf ("%f", &denominator); printf ("\nProbability Of Destruction Is: %f\n\n", numerator/denominator); interval = (int)((numerator/denominator)*RAND_MAX); if ((fp = fopen ("plantdestruction.txt", "w")) == NULL) { printf ("\nError: Unable to open file"); return 1; } end = end + time (0); while (time (0) < end) { sample = rand (); fprintf (fp,"Plant Destruction Log"); fprintf (fp, "Day: %d\t", total); if (sample < interval) { fprintf (fp, "Destroyed\n\n"); created++; } else fprintf (fp, "Not Destroyed\n\n"); total++; printf("Herbivore:"); printf("\n\n"); printf ("Enter the Numerator for Creation: "); scanf ("%f", &numerator); printf ("Enter the Denominator for Creation: "); scanf ("%f", &denominator); printf ("\nProbability Of Creation Is: %f\n\n", numerator/denominator); interval = (int)((numerator/denominator)*RAND_MAX); if ((fp = fopen ("herbivorecreation.txt", "w")) == NULL) { printf ("\nError: Unable to open file"); return 1; } end = end + time (0); while (time (0) < end) { sample = rand (); fprintf (fp,"Herbivore Creation Log"); fprintf (fp, "Day: %d\t", total); if (sample < interval) { fprintf (fp, "Created\n\n"); created++; } else fprintf (fp, "Not Created\n\n"); total++; } printf ("Enter the Numerator for Destruction: "); scanf ("%f", &numerator); printf ("Enter the Denominator for Destruction: "); scanf ("%f", &denominator); printf ("\nProbability Of Destruction Is: %f\n\n", numerator/denominator); interval = (int)((numerator/denominator)*RAND_MAX); if ((fp = fopen ("herbivoredestruction.txt", "w")) == NULL) { printf ("\nError: Unable to open file"); return 1; } end = end + time (0); while (time (0) < end) { sample = rand (); fprintf (fp,"Herbivore Destruction Log"); fprintf (fp, "Day: %d\t", total); if (sample < interval) { fprintf (fp, "Destroyed\n\n"); created++; } else fprintf (fp, "Not Destroyed\n\n"); total++; } printf("Carnivore:"); printf("\n\n"); printf ("Enter the Numerator for Creation:"); scanf ("%f", &numerator); printf ("Enter the Denominator for Creation:"); scanf ("%f", &denominator); printf ("\nProbability Of Creation Is: %f\n\n", numerator/denominator); interval = (int)((numerator/denominator)*RAND_MAX); if ((fp = fopen ("carnivorecreation.txt", "w")) == NULL) { printf ("\nError: Unable to open file"); return 1; } end = end + time (0); while (time (0) < end); { sample = rand (); fprintf (fp,"Carnivore Creation Log"); fprintf (fp, "Day: %d\t", total); if (sample < interval) { fprintf (fp, "Created\n\n"); created++; } else fprintf (fp, "Not Created\n\n"); total++; } printf ("Enter the Numerator for Destruction: "); scanf ("%f", &numerator); printf ("Enter the Denominator for Destruction: "); scanf ("%f", &denominator); printf ("\nProbability Of Destruction Is: %f\n\n", numerator/denominator); interval = (int)((numerator/denominator)*RAND_MAX); if ((fp = fopen ("carnivoredestruction.txt", "w")) == NULL) { printf ("\nError: Unable to open file"); return 1; } end = end + time (0); while (time (0) < end); { sample = rand (); fprintf (fp,"Carnivore Destruction Log"); fprintf (fp, "Day: %d\t", total); if (sample < interval) { fprintf (fp, "Destroyed\n\n"); created++; } else fprintf (fp, "Not Destroyed\n\n"); total++; } return 0; }

jolszewski