How to understand about memset function

This article introduces how to understand the memset function. I hope you will learn patiently.

About memset function (initialization function):

void *memset(void *s, int ch, size_t n);
Function explanation: Replace n bytes (typedef unsigned int size_t) following the current position in s with ch and return s.
memset: The function is to fill a given value in a memory block. It is the fastest way to clear a larger structure or array.
The memset() function prototype is extern void *memset(void *buffer, int c, int count) buffer: is a pointer or array, c: is the value assigned to the buffer, count: is the length of the buffer.
Header file: memory.h or string.h

For example: int map[1001][1001];
memset(map,0,sizeof(map));

##About memset function (initialization function): void *memset(void *s, int ch, size_t n);

Function explanation: Set n bytes after the current position in s (typedef unsigned int size_t) Replace s with ch and return s.
memset: The function is to fill a given value in a memory block. It is the fastest way to clear a larger structure or array. The memset() function prototype is extern void *memset(void *buffer, int c, int count) buffer: is a pointer or array, c: is the value assigned to the buffer, count: is the length of the buffer.
Header file: memory.h or string.h

For example: int map[1001][1001];

memset(map,0,sizeof(map));

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