An example call to the printf function printf is a c standard library function that formats text and writes it to standard output Mismatch between the format specifiers and count and type of values results in undefined behavior and possibly program crash. Some shells implement the command as builtin and some provide it as a utility program [2] the command has similar syntax and semantics as the library function The command outputs text to standard output [3] as specified by a format string and a. [1][2] stack buffer overflow bugs are caused when a program writes more data to a buffer located on the stack than what is actually allocated for that buffer In the following example expressed in c, a program has two variables which are adjacent in memory
The length of a string is the number of code units before the zero code unit [1] the memory occupied by a string is always one more code unit than the length, as space is needed to store the zero terminator Generally, the term string means a string where the code unit is of type char, which is exactly 8 bits on all modern machines. See for example concatenation below.
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