Stack arrays are generally allocated at run time. Why this work? Stack array is not allocated at runtime time, its size is fixed, why this "pseudo-dynamic" array works?.It compiled because the compiler supported variable length arrays. It may appear to work in some circumstances, as long as the overrun does not destroy other data your program needs to appear to work. Doing so may corrupt your program’s memory in various ways. Commonly, there is nothing to prevent you from trying to use six or more elements of a five-element array. tar xzf robo3t-1.3. mkdir /opt/robomongo Next, extract Robo 3T to the directory created above. Create a directory under /opt directory to store Robomongo binary and libraries. When you use more elements than have been allocated for an array, the behavior is not defined by the C standard or, generally, but an implementation (except when using debugging or safety features to detect or avoid overruns). Once the download is complete, you need to extract the Robo 3T (Robomongo) binary. I assign 100 values to it, end part(out of range) gets wrong value, remaining still correct. I assign 6 values to it, works(No seg fault). It was made an optional feature in later versions of the standard, but compilers that had support previously generally retained it.Īre you saying there is a rule that the compiler shall report an error for this? What rule, why do you say that? Compilers earlier than that may have supported it as an extension. 2034, C16S10-32G-YR-BRNZ, Bullion 10 socket-32GB-Per Year Support -Bronze. Support for variable-length arrays was required in C 1999. 1788, CON-SW-ESAC17K0, SNTC-NO RMA ESA C170 Email Security Appliance with S.
ROBO 3T NO UNIX SOCKET SUPPORT ON WINDOWS CODE
However, today, I face this kind of code at work, I use -std=c89, and c99, etc, no any problem. An automatic array can have a variable length (subject to compiler support), since it is commonly implemented by using the hardware stack, which is designed to support run-time allocations. A static array cannot have a variable length, since its length must be fixed during translation time (compilation time). I remember that stack array CANNOT assign its size by variable(except const), because variable only know when runtime.
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