Lesson plan
Flexible array member
C struct data types may end with a flexible array member with no specified size: typedef struct { size_t len; // there must be at least one other data member double arr[]; // the flexible array member must be last // The compiler may reserve extra padding space here, like it can between struct members } DoubleArray; Typically, such structures serve as the header in a larger, variable memory allocation: // see section on size and padding DoubleArray* darray = malloc(sizeof(DoubleArray) + ... * sizeof(double)); darray->len = ...; for (int i = 0; i len; i++) { darray->arr[i] = ...; // transparently uses the right type (double) }
Article summary
C struct data types may end with a flexible array member with no specified size: typedef struct { size_t len; // there must be at least one other data member double arr[]; // the flexible array member must be last // The compiler may reserve extra padding space here, like it can between struct members } DoubleArray; Typically, such structures serve as the header in a larger, variable memory allocation: // see section on size and padding DoubleArray* darray = malloc(sizeof(DoubleArray) + ... * sizeof(double)); darray->len = ...; for (int i = 0; i len; i++) { darray->arr[i] = ...; // transparently uses the right type (double) }
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.