Memset in C++
Memset() is a C++ function. It copies a single character for a specified number of times to an object. It is defined in <cstring> header file.
void* memset( void* str, int ch, size_t n);
Memset() converts the value ch to unsigned char and copies it into each of the first n characters of the object pointed to by str. If the object is not trivially-copyable (e.g., scalar, array, or a C-compatible struct), the behavior is undefined. If n is greater than the size of the object pointed to by str, the behavior is undefined.
- str : Pointer to the object to copy the character.
- ch : The character to copy.
- n : Number of bytes to copy.
Return value: The memset() function returns str, the pointer to the destination string.
Note: We can use memset() to set all values as 0 or -1 for integral data types also. It will not work if we use it to set as other values. The reason is simple, memset works byte by byte.
0 0 0 0 0 -1 -1 -1 -1 -1 84215045 84215045 84215045 84215045 84215045
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