C++ cstring memchr() function
Example
Get a pointer to the first byte in a block of memory which contains a specified value:
char myStr[] = "Hello World!";
char * myPtr = (char*)memchr(myStr, 'o', 12);
cout << myPtr;
Definition and Usage
The memchr() function returns a pointer to the first byte in a block of memory which contains a specified value.
The memchr() function is defined in the <cstring> header file.
Note: The memchr() function is generalized for memory of any type. When working with C-style strings (char arrays) it is better to use the strchr() function instead.
Syntax
memchr(void * pointer, int value, size_t size);The size_t data type is a positive integer.
Parameter Values
| Parameter | Description |
|---|---|
| pointer | Required. A pointer to the block of memory to search in. |
| value | Required. The value to search for. |
| size | Required. The size of the block of memory to search in. |
Technical Details
| Returns: | A void type pointer to the position in memory where the value was found or a NULL pointer if the value was not found. |
|---|
