SIG_DFL, SIG_IGN
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | Defined in header  <signal.h> | ||
| #define SIG_DFL /*implementation defined*/ | ||
| #define SIG_IGN /*implementation defined*/ | ||
The SIG_DFL and SIG_IGN macros expand into integral expressions that are not equal to an address of any function. The macros define signal handling strategies for signal() function.
| Constant | Explanation | 
| SIG_DFL | default signal handling | 
| SIF_IGN | signal is ignored | 
[edit] Example
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Output:
(none)
[edit] Example
Run this code
Output:
Exit main()
[edit] See also
| C++ documentation for SIG_DFL, SIG_IGN | 


