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--- guides:common_coding_errors_payload_testing [2012/10/09 18:52] – danielrichman
+++ guides:common_coding_errors_payload_testing [2012/10/09 18:54] (current) – [Prime Meridian] danielrichman
@@ Line 94: / Line 94: @@
 There's another case to consider. Clearly the idea is to split the float into the an integer and a fraction of an integer (i1 and i2 respectively).
-The intention is the above code is that the integer part will supply the negative sign if required. However, consider -0.7. i1 would be 0, because -0 is the same as zero, and the result would be "0.7". We'll have to handle negative numbers explicitly.
+The intention is the above code is that the integer part will supply the negative sign if required. However, consider -0.7. i1 would be -0, but -0 == 0, and the result would be "0.7". We'll have to handle negative numbers explicitly:
+<code c>snprintf(where, buf_size, "%s%i.%06li", (what < 0 ? "-" : ""), labs(i1), i2);</code>
 ==== Equatorial ====