c - Null termination of char array - Stack Overflow
If you type more than four characters then the extra characters and the null terminator will be written outside the end of the array, overwriting memory not belonging to the array. This is a buffer overflow. C does not prevent you from clobbering memory you don't own.
Setting a char * to null | Forum
char * username; strcpy(username, "ted"); How do you set the pointer so its empty and does not hold the name ted?
Заметка про NULL / Хабр | select col from ttt where col is not null
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.
Convert char to int in C and C++ - Stack Overflow
char c = somevalue; signed char sc = c; unsigned char uc = c; int n = c; But, when somevalue is outside of that range, only going through unsigned char gives you consistent results for the "same" char values in
SQL NOT NULL Constraint
SQL NOT NULL Constraint. By default, a column can hold NULL values. The NOT NULL constraint enforces a column to NOT accept NULL values. This enforces a field to always contain a value, which means that you cannot insert a new record, or update a record without adding a value to this field.
[Solved] Adding to an unsigned char - CodeProject
unsigned char buffer[4]. I have initialized all bytes to have 0 0x00. I am adding to the 0 th element occasionally.
SELECT (обучающий этап) задачи по SQL запросам
exercises-on-sql.blogspot.com
Если нет сражения, произошедшего после спуска на воду корабля, вывести NULL вместо названия сражения.
GetChars(Byte*, Int32, Char*, Int32) | Microsoft Docs
The byte version of GetChars(Byte*, Int32, Char*, Int32) allows some fast techniques, particularly with multiple calls to large buffers. Bear in mind, however, that this method version is sometimes unsafe, since pointers are required. If your app must convert a large amount of data, it should reuse the...