* enhance time calculation

1 files changed, 6 insertions, 5 deletions

diff --git a/src/pi8.c b/src/pi8.c
index ef49b24..27a2c4d 100644
--- a/src/pi8.c
+++ b/src/pi8.c
@@ -61,6 +61,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
+#include <sys/time.h>
 
 #define SHOWTIME
 
@@ -221,7 +222,7 @@ void arctan(int multiplier, int denom, int sign)
 int main(int argc, char *argv[])
 {
       INDEXER x;
-      time_t T1, T2;
+      struct timeval start, stop, diff;
 
       if (argc != 2)
       {
@@ -251,7 +252,7 @@ int main(int argc, char *argv[])
       for (x = 0; x < size; x++)
             pi[x] = 0;
 
-      T1 = time(NULL);
+      gettimeofday(&start, NULL);
 
 #if defined ARC3
       arctan(8, 3, 1);
@@ -274,11 +275,11 @@ int main(int argc, char *argv[])
       arctan(4, 239, -1);
 #endif
 
-      T2 = time(NULL);
-
+      gettimeofday(&stop, NULL);
       Print(pi);
 
-      printf("\nCalculation time %0.0lf\n", difftime(T2, T1));
+      timersub(&stop, &start, &diff);
+      printf("\nCalculation time %ldsec %ldusec\n", diff.tv_sec, diff.tv_usec);
 
       return EXIT_SUCCESS;
 }