Add examples: sum, prod, avg, median

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 36 insertions, 0 deletions

diff --git a/examples/01-sum.c b/examples/01-sum.c
new file mode 100644
index 0000000..45463ed
--- /dev/null
+++ b/examples/01-sum.c
@@ -0,0 +1,36 @@
+/* Calculates the sum of $@ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <zahl.h>
+
+int
+main(int argc, char *argv[])
+{
+	z_t sum, term;
+	jmp_buf env;
+	char *buf;
+	int i;
+
+	if (setjmp(env))
+		return zperror(argv[0]), 1;
+
+	zsetup(env);
+	zinit(sum);
+	zinit(term);
+	zsetu(sum, 0);
+
+	for (i = 1; i < argc; i++) {
+		zsets(term, argv[i]);
+		zadd(sum, sum, term);
+	}
+
+	printf("%s\n", buf = zstr(sum, NULL, 0));
+	free(buf);
+
+	zfree(term);
+	zfree(sum);
+	zunsetup();
+	return 0;
+}