What is the function of the memset function in C++?

In C++, the memset() function is used to set the values of a block of memory to a specific value. The function prototype is as follows:

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

ptr is a pointer pointing to the memory area where the value is to be set, value is the value to be set, and num is the number of bytes to be set.

The memset() function sets the first num bytes of the memory area pointed to by ptr to the value specified. This function is typically used for initializing or clearing memory areas.

For example, you can use the memset() function to initialize an integer array to 0.

int arr[5];
memset(arr, 0, sizeof(arr));

The code above sets all elements of the array arr to 0.