c/pic/main.cpp

   1 #include <stdio.h>
   2 #include <math.h>
   3 #include <time.h>
   4 #define PI 3.141592653589793
   5
   6 int main(void) {
   7   double currPi=0, i=1;
   8   clock_t begin, end;
   9
  10   begin = clock();
  11   do {
  12     currPi+=(4/i - 4/(i+2));
  13     i+=4;
  14   } while(fabs(PI-currPi) > 1e-7);
  15   end = clock();
  16
  17   printf("Vypocteno Pi = %lf v case: %f ms.\n", currPi,
  18          (float)(end-begin)/CLOCKS_PER_SEC * 1000);
  19
  20     //system("PAUSE");
  21     //return EXIT_SUCCESS;
  22 }