How to resolve compiler warning 'implicit declaration of function memset'

Question

My c code uses \'memset\' and \'close\'. And I have added:

#include 
#include 
#include 

But I sti

Answer 1

A good way to findout what header file you are missing:

 man 
 

To find out the section use:

apropos 

Example:

 man 3 memset
 man 2 send

Edit in response to James Morris:

• Section | Description
• 1 General commands
• 2 System calls
• 3 C library functions
• 4 Special files (usually devices, those found in /dev) and drivers
• 5 File formats and conventions
• 6 Games and screensavers
• 7 Miscellanea
• 8 System administration commands and daemons

Source: Wikipedia Man Page