Eric Postpischil

Eric Postpischil has asked 36 questions and find answers to 970 problems.

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About

Senior software engineer in Apple’s Vector and Numerics Group (retired).

Eric Postpischil questions

Why do GCC and Clang produce different output with variable length array?
How to fix "variable previously declared 'static' redeclared 'extern' error"? [duplicate]
Is an fscanf/scanf/sscanf conversion specification with assignment suppressed not a conversion?
Is GCC warning on const qualifier correct?
Is assigning to a union member from a different member in the same union defined by the C standard?
Why is _Alignof missing from the rule about converting an array to a pointer?
Why was SIGFPE used for integer arithmetic exceptions?
Is a redeclaration of an untagged structure a compatible type?
May C evaluate with multiple floating-point formats?
How are multiple prior declarations resolved for a new declaration with extern?

Eric Postpischil answers

Is there any way I can make "protected" typedef's in C?
How to prevent auto optimization from for loop to memset() in Visual Studio?
C - Signedness when adding raw bytes
C compiler option to forbid any kind of illegal memory access
what's the largest number float type can hold?
Data Alignment for C struct
Are functions external by default?
Why do I get large random values when using scanf("%f", &intVar)? How do float inputs get converted to these values?
why String.format 0.1d double value as exact 0.1 in java?
Is using a stride of 1 still critical to vDSP performance today?