KITFORMA · EDITORIAL GUIDE
Why does assigning integer division to double still lose the fraction?
KitForma editorial guide. The division is evaluated using its operand types before assignment. Storing the already truncated integer result in double cannot restore the discarded fraction.
Step-by-step guidance
The division is evaluated using its operand types before assignment. Storing the already truncated integer result in double cannot restore the discarded fraction.
Convert an operand before division, such as
(double)completed / total, after validating total is nonzero. Keep integer arithmetic when a floor-like count is genuinely intended, and document rounding for negative values separately. Avoid changing a count’s storage type merely to repair one ratio.
Test one divided by four and values larger than double can represent exactly. Floating point is suitable for many ratios but not an automatic exact-money representation. A later percentage multiplication can introduce further rounding that presentation should handle deliberately.Sources and verification
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