Talk:Constant (computer programming)
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Inaccurate definition
[edit ]can a constant be a kind of variable ? maybe it is a data type. —Preceding unsigned comment added by 82.137.200.8 (talk) 17:40, 19 November 2010 (UTC) [reply ]
Inaccurate introduction
[edit ]"In computer programming, a constant is a special kind of variable whose value cannot be altered during program execution." This isn't completely accurate as there are exceptions to the 'rule'. The following C++ code will change the value of a constant:
constinta=1; int*ptr_a=(int*)(&a); cout<<a;// outputs 1 *ptr_a=2;// legal statement cout<<a;// outputs 2
It is also possible to change a #define defined symbolic constant much easier. Andrew (talk) 00:12, 30 July 2009 (UTC) [reply ]
- The code posted here has undefined behaviour. 213.67.240.59 (talk) 14:16, 17 October 2017 (UTC) [reply ]