What does memset do in C?
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What does memset do in C?
Description. The memset() function sets the first count bytes of dest to the value c. The value of c is converted to an unsigned character.
Does memset work on 2D array?
If the 2D array has automatic storage duration, then you can use an array initializer list to set all members to zero. int arr[10][20] = {0}; // easier way // this does the same memset(arr, 0, sizeof arr); If you allocate your array dynamically, then you can use memset to set all bytes to zero.
Why does memset only work for 0 and 1?
memset allows you to fill individual bytes as memory and you are trying to set integer values (maybe 4 or more bytes.) Your approach will only work on the number 0 and -1 as these are both represented in binary as 00000000 or 11111111 . Show activity on this post. Because memset works on byte and set every byte to 1.
Can memset be used on int array?
Nope. memset() casts down to a byte and dupes it across the region.
Which library is memset in?
The C library function void *memset(void *str, int c, size_t n) copies the character c (an unsigned char) to the first n characters of the string pointed to, by the argument str.
Where is memset located?
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 header file.
What can I use instead of memset in C?
There isn’t a standard function for this – you will just need to call memcpy() in a loop: my_stuff *my_array = malloc(MAX * sizeof(my_stuff)); my_stuff tmp; size_t i; tmp.
Why do we use memset?
memset() is used to fill a block of memory with a particular value.
Which library has memset?
C library function – memset() The C library function void *memset(void *str, int c, size_t n) copies the character c (an unsigned char) to the first n characters of the string pointed to, by the argument str.
