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  2. Stack buffer overflow - Wikipedia

    en.wikipedia.org/wiki/Stack_buffer_overflow

    This code takes an argument from the command line and copies it to a local stack variable c. This works fine for command-line arguments smaller than 12 characters (as can be seen in figure B below). Any arguments larger than 11 characters long will result in corruption of the stack.

  3. Flexible array member - Wikipedia

    en.wikipedia.org/wiki/Flexible_array_member

    C struct data types may end with a flexible array member [1] with no specified size: struct vectord { short 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 };

  4. C syntax - Wikipedia

    en.wikipedia.org/wiki/C_syntax

    The largest allowed array subscript is therefore equal to the number of elements in the array minus 1. To illustrate this, consider an array a declared as having 10 elements; the first element would be a[0] and the last element would be a[9]. C provides no facility for automatic bounds checking for array usage. Though logically the last ...

  5. Command-line argument parsing - Wikipedia

    en.wikipedia.org/wiki/Command-line_argument_parsing

    PHP uses argc as a count of arguments and argv as an array containing the values of the arguments. [4] [5] To create an array from command-line arguments in the -foo:bar format, the following might be used:

  6. Variable-length array - Wikipedia

    en.wikipedia.org/wiki/Variable-length_array

    The declaration of such a variable is similar to the declaration of a static array, but without specifying its size. The size of the array is given at the time of its use. program CreateDynamicArrayOfNumbers ( Size : Integer ) ; var NumberArray : array of LongWord ; begin SetLength ( NumberArray , Size ) ; NumberArray [ 0 ] := 2020 ; end .

  7. C (programming language) - Wikipedia

    en.wikipedia.org/wiki/C_(programming_language)

    The total size of an array x can be determined by applying sizeof to an expression of array type. The size of an element can be determined by applying the operator sizeof to any dereferenced element of an array A, as in n = sizeof A[0]. Thus, the number of elements in a declared array A can be determined as sizeof A / sizeof A[0]. Note, that if ...

  8. Longest palindromic substring - Wikipedia

    en.wikipedia.org/wiki/Longest_palindromic_substring

    A faster algorithm can be achieved in the word RAM model of computation if the size of the input alphabet is in (⁡). In particular, this algorithm runs in O ( n log ⁡ σ / log ⁡ n ) {\displaystyle O(n\log \sigma /\log n)} time using O ( n log ⁡ σ / log ⁡ n ) {\displaystyle O(n\log \sigma /\log n)} space. [ 1 ]

  9. Magic number (programming) - Wikipedia

    en.wikipedia.org/wiki/Magic_number_(programming)

    where a is an array object, the function randomInt(x) chooses a random integer between 1 and x, inclusive, and swapEntries(i, j) swaps the ith and jth entries in the array. In the preceding example, 52 and 53 are magic numbers, also not clearly related to each other. It is considered better programming style to write the following: