Initial commit

kapitel19/felsok-ex2.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+float circum(float d);
+
+int main(int argc, char *argv[])
+{
+    float di;
+    if (argc < 2)
+    {
+        fprintf(stderr, "Usage: %s diamater\n", argv[0]);
+        return 1;
+    }
+
+    di = atof(argv[1]);
+    printf ("Circumference of a circle with a diamater %.2f is"
+            " %.2f\n", di, circum(di));
+    return 0;
+}
+
+float circum(float d)
+{
+    float pi = 3.14159265;
+    return (pi*d);
+}