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  2. C string handling - Wikipedia

    en.wikipedia.org/wiki/C_string_handling

    Returns the number of initial bytes in a string that are in a second string strcspn [42] wcscspn [43] Returns the number of initial bytes in a string that are not in a second string strpbrk [44] wcspbrk [45] Finds in a string the first occurrence of a byte in a set strstr [46] wcsstr [47] Finds the first occurrence of a substring in a string ...

  3. Semipredicate problem - Wikipedia

    en.wikipedia.org/wiki/Semipredicate_problem

    Similarly, a function that normally returns a string might sometimes return the empty string as a valid response, but return false on failure. This process of type-juggling necessitates care in testing the return value: e.g., in PHP, use === (i.e., equal and of same type) rather than just == (i.e., equal, after automatic type conversion). It ...

  4. C syntax - Wikipedia

    en.wikipedia.org/wiki/C_syntax

    A snippet of C code which prints "Hello, World!". The syntax of the C programming language is the set of rules governing writing of software in C. It is designed to allow for programs that are extremely terse, have a close relationship with the resulting object code, and yet provide relatively high-level data abstraction.

  5. Return statement - Wikipedia

    en.wikipedia.org/wiki/Return_statement

    The return value from a function is provided within the function by making an assignment to an identifier with the same name as the function. [5] However, some versions of Pascal provide a special function Exit(exp); that can be used to return a value immediately from a function, or, without parameters, to return immediately from a procedure. [6]

  6. printf - Wikipedia

    en.wikipedia.org/wiki/Printf

    Extra value parameters are ignored, but if the format string has more format specifiers than value parameters passed the behavior is undefined. For some C compilers, an extra format specifier results in consuming a value even though there isn't one. This can allow the format string attack. Generally, for C, arguments are passed on the stack. If ...

  7. C (programming language) - Wikipedia

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

    The return value of the printf function is of type int, but it is silently discarded since it is not used. (A more careful program might test the return value to check that the printf function succeeded.) The semicolon ; terminates the statement. The closing curly brace indicates the end of the code for the main function.

  8. Escape sequences in C - Wikipedia

    en.wikipedia.org/wiki/Escape_sequences_in_C

    In order to denote the byte with numerical value 1, followed by the digit 1, one could use "\1""1", since C concatenates adjacent string literals. Some three-digit octal escape sequences are too large to fit in a single byte. This results in an implementation-defined value for the resulting byte.

  9. Function (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Function_(computer...

    Assign a data type to the return value, if any; Specify a return value in the function body; Call a function; Provide actual parameters that correspond to a called function's formal parameters; Return control to the caller at the point of call; Consume the return value in the caller; Dispose of the values returned by a call

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