Mohtalim

Code: Select all

#include <stdio.h>


void sleeptime() {
  printf("  sleeptime(): start\n");
  sleep(5);
  printf("  sleeptime(): done!\n");
}

void sleeptime_variable(int i) {
  printf("  sleeptime_variable(%d): start\n");
  sleep(i);
  printf("  sleeptime_variable(%d): done!\n");
}

void timer2(void f()) {
  printf("\ntimer2(): start\n");
  clock_t start = clock();
  f();
  printf("timer2(): done! (%lf ms)\n",
	 (clock() - start)/(CLOCKS_PER_SEC / (double) 1000.0));
}

void timer(void f()) {
  printf("\ntimer(): start\n");
  clock_t start = clock();
  f();
  clock_t end = clock();
  printf("timer(): done! (%lf ms)\nNote: ", end-start);
  if (start == end) {
    printf("start == end\n");
  } else {
    printf("start != end\n");
  }
}

void main() {
  timer(sleeptime);
  timer2(sleeptime);
}

Code: Select all

timer(): start
  sleeptime(): start
  sleeptime(): done!
timer(): done! (0.000000 ms)
Note: start == end

timer2(): start
  sleeptime(): start
  sleeptime(): done!
timer2(): done! (0.000000 ms)

Code: Select all

#include <stdio.h>



// this is a wrapper that takes in a method
// note: the method's signature must be completely specified
//       in the wrapper's signature
void timer(vector<int> v, void print_method(vector<int>)) {
  clock_t start = clock();
  print_method(v);
  printf("time: %lf ms\n",
	 (clock() - start)/(CLOCKS_PER_SEC / (double) 1000.0));
}

void print_vector_slow(vector<int> v) {
  for(int i=0;i<v.size();i++) {
    //    printf(" %d", v[i]);
  }
  printf("\ndone! (print_vector_slow)\n");
}

void print_vector_medium(vector<int> v) {
  vector<int>::iterator v_iter = v.begin();
  while(v_iter != v.end()) {
    //    printf(" %d", *(v_iter++));
    v_iter++;
  }
  printf("\ndone! (print_vector_medium)\n");
}

void print_vector_fast(vector<int> v) {
  vector<int>::iterator v_iter = v.begin();
  int * v_end = v.end();
  while(v_iter != v_end) {
    //    printf(" %d", *(v_iter++));
    v_iter++;
  }
  printf("\ndone! (print_vector_fast)\n");
}

void main() {
  vector<int> v_x;
  int i = 0; while (i<5000000) { v_x.push_back(i++); }
  timer(v_x,print_vector_slow);
  timer(v_x,print_vector_medium);
  timer(v_x,print_vector_fast);
}

Code: Select all

done! (print_vector_slow)
time: 380.000000 ms

done! (print_vector_medium)
time: 150.000000 ms

done! (print_vector_fast)
time: 110.000000 ms

Code: Select all

struct {
  int A;
  int B;
  double C;
} arg1_t;

struct {
  char X;
  char Y;
} arg2_t;

void fn1(void * args) {
   dostuff((arg1_t*)args);
}

void fn2(void * args) {
   dodifferentthings((arg2_t*)args);
}

void callmyfunction(void genericfn(void * args), void * thisargs, SomeType otherarg) {
  calculatestuff(otherarg);
  genericfn(thisargs);
}

int main() {
  arg1_t *penis = initialize();
  callmyfunction(fn1, (void *)penis, iamtirednow)
  return LOVE_FOR_VINNY;
}