Changes between Initial Version and Version 1 of cypress/Programming/ApproximatePi/CExample

Timestamp:

05/14/15 14:40:19 (10 years ago)

Author:

cmaggio

Comment:

migrated content from ccs wiki

cypress/Programming/ApproximatePi/CExample

@@ +1 @@
+= Ex12sq.c =
+{{{#!C
+/*
+  C sample
+  ex12sq.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+ 
+int main (int argc, char *argv[]) {
+  int i,n;
+  double x;
+ 
+  if (argc < 2){
+    printf("%s [number of terms]\n",argv[0]);
+    exit(-1);
+  }
+ 
+  n = atoi(argv[1]);
+  printf("Start n=%d\n",n);
+ 
+  x=0.0;
+ 
+  for (i = 0 ; i < n ; i+=2){
+    x += 1.0 / (double)(2 * i + 1);
+    x -= 1.0 / (double)(2 * i + 3);
+  }
+  printf("n=%d Pi=%1.16f\n",n,4.0 * x);
+}
+}}}