the pointer in c

  • The qsort () function in C

    The qsort () function in C

     void qsort function (void * base, so-phan-tu, kich-co, int (* compar) (const void *, const void *)) arranges an array.
  • The function ldiv () in C

    The function ldiv () in C

     the div_t div function (long int numer, long int denom) divides the numerator numer to denom.
  • The function atexit () in C

    The function atexit () in C

     int atexit function (void (* func) (void)) calls function func when the program ends. you can register your end function (func function) wherever you like, but this function will be called at the end of the program.