Graduate

Signed-off-by: Matt Strapp <matt@mattstrapp.net>

1 files changed, 43 insertions, 0 deletions

diff --git a/csci4061/110920_breakout/chap8/pgm_8_5.c b/csci4061/110920_breakout/chap8/pgm_8_5.c
new file mode 100644
index 0000000..b20cdfa
--- /dev/null
+++ b/csci4061/110920_breakout/chap8/pgm_8_5.c
@@ -0,0 +1,43 @@
+// Program 8.5
+
+#include <math.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static volatile sig_atomic_t doneflag = 0;
+
+/* ARGSUSED */
+static void setdoneflag(int signo) {
+   doneflag = 1;
+}
+
+int main (void) {
+   struct sigaction act;
+   int count = 0;
+   double sum = 0;
+   double x;
+
+   act.sa_handler = setdoneflag;            /* set up signal handler */
+   act.sa_flags = 0;
+   if ((sigemptyset(&act.sa_mask) == -1) ||
+       (sigaction(SIGINT, &act, NULL) == -1)) {
+      perror("Failed to set SIGINT handler");
+      return 1;
+   }
+    
+   while (!doneflag) {
+      x = (rand() + 0.5)/(RAND_MAX + 1.0);
+      sum += sin(x);
+      count++;
+      printf("Count is %d and average is %f\n", count, sum/count);
+      sleep(3);
+   }
+
+   printf("Program terminating ...\n");
+   if (count == 0)
+      printf("No values calculated yet\n");
+   else
+      printf("Count is %d and average is %f\n", count, sum/count);
+   return 0;
+}
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