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Text File  |  1990-12-12  |  331b  |  12 lines
  1.  
  2.  
  3. void *sbrk(int n);      // prototype for sbrk
  4.  
  5. char *p,*q;             // two pointers for allocated blocks
  6.  
  7. p = (char *)sbrk(100);  // allocate a 100-byte block
  8. q = (char *)sbrk(200);  // allocate a 200-byte block
  9.  
  10. sbrk(-200);             // free the 200-byte block
  11. sbrk(-100);             // free the 100-byte block
  12.