| 词条 | Unreferenced variable |
| 释义 |
An unreferenced variable in the source code of a computer program is a variable that is defined but which is never used. This may result in a harmless waste of memory. Many compilers detect such variables and do not allocate storage for them (i.e., "optimize away" their storage), generally also issuing a warning as they do. Some coding guideline documents consider an unreferenced variable to be a symptom of a potential coding fault. On the other hand, unreferenced variables can be used as temporary placeholders to indicate further expected future developments in the code. ExamplesC: int main(void) { int i, j; for (i=0; i<10; i++) printf("%d", i); return 0; }In this example, j is an unreferenced variable. {{DEFAULTSORT:Unreferenced Variable}}{{Compu-prog-stub}} 1 : Variable (computer science) |
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