c - "ld returned 1 exit status" and "incompatible implicit declaration of built-in function 'exit' " -

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i bored, started study new, in case, c.

i trying basic script in c i'm having error, , don't know wrong.

//tablas  #include <stdio.h>  int main() {      double i, j, p;     int x, y;      printf ("tablas del: ");     scanf ("%i", &x);     printf ("hasta el: ");     scanf ("%i", &y);      file *f;     f = fopen("tablas.txt", "w");     if (f == null) {         printf("no se ha podido abrir/crear/reemplazar el archivo\n\a");         exit(1);     }      printf ("espere mientras se calcula los resulatdos.\n");     system ("del tablas.txt");      (i = x ; <= y ; i++) {         (j = x ; j <= 10 ; j++) {             fprinf(f, "%f x %f = %f\n", i, j, i*j);         }     }     printf ("\nfin\n\a");     system ("pause");     return 0;    }

you need #include <stdlib.h> exit work.


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