Initial commit

1 files changed, 26 insertions, 0 deletions

diff --git a/src/examples/sumargv.c b/src/examples/sumargv.c
new file mode 100644
index 0000000..06962f9
--- /dev/null
+++ b/src/examples/sumargv.c
@@ -0,0 +1,26 @@
+#include <stdlib.h>
+
+int
+main (int argc, char **argv)
+{
+  int i;
+  int sum = 0;
+  char* argv_me = "sumargv";
+  char* p;
+
+  for (p = argv_me, i = 0; *p; ++p, ++i)
+    sum += (*p - 'a') * i;
+
+  for (p = argv[0], i = 0; *p; ++p, ++i)
+    sum -= (*p - 'a') * i;
+
+  /* if program name is correctly set up sum should now be zero */
+  
+  for (i = 1; i < argc; i++)
+    sum += atoi(argv[i]);
+
+  /* if argv ends correctly with a null pointer this has no effect */
+  sum += argv[argc];
+  
+  return sum;
+}