Memset function in C++

memset function in C++ is used to fill a block of memory with a particular value. The function takes three parameters: a pointer to the block of memory, the value to be set, and the number of bytes to be set to the value. The function returns a pointer to the memory area.

The syntax of the memset function is:

void memset(void ptr, int value, size_t num);

Here's a breakdown of each parameter: 1. ptr: A pointer to the block of memory to be filled. 2. value: The value to be set. It is given as an integer, which will be converted to an unsigned char. 3. num: The number of bytes to be set to the value.

For example, to fill an array with the value 0, the memset function can be used as follows:

int arr[10];
memset(arr, 0, sizeof(arr));