C++ Programming Code Examples
Learn C++ Language
exit() Function in C++ Programming Language
exit() Function in C++
The exit function terminates the program normally. Automatic objects are not destroyed, but static objects are. Then, all functions registered with atexit are called in the opposite order of registration. The code is returned to the operating system. An exit code of 0 or EXIT_SUCCESS means successful completion. If code is EXIT_FAILURE, an indication of program failure is returned to the operating system. Other values of code are implementation-defined.
Syntax for exit() Function in C++
void exit (int status);
status
Status code. If this is 0 or EXIT_SUCCESS, it indicates success. If it is EXIT_FAILURE, it indicates failure.
Calls all functions registered with the atexit() function, and destroys C++ objects with static storage duration, all in last-in-first-out (LIFO) order. C++ objects with static storage duration are destroyed in the reverse order of the completion of their constructor. (Automatic objects are not destroyed as a result of calling exit().)
Functions registered with atexit() are called in the reverse order of their registration. A function registered with atexit(), before an object obj1 of static storage duration is initialized, will not be called until obj1's destruction has completed. A function registered with atexit(), after an object obj2 of static storage duration is initialized, will be called before obj2's destruction starts.
Normal program termination performs the following (in the same order):
• Objects associated with the current thread with thread storage duration are destroyed (C++11 only).
• Objects with static storage duration are destroyed (C++) and functions registered with atexit are called.
• All C streams (open with functions in <cstdio>) are closed (and flushed, if buffered), and all files created with tmpfile are removed.
• Control is returned to the host environment.
Note that objects with automatic storage are not destroyed by calling exit (C++).
If status is zero or EXIT_SUCCESS, a successful termination status is returned to the host environment.
If status is EXIT_FAILURE, an unsuccessful termination status is returned to the host environment.
Otherwise, the status returned depends on the system and library implementation.
Flushes all buffers, and closes all open files.
All files opened with tmpfile() are deleted.
Returns control to the host environment from the program.
exit() returns no values.
/* terminate the process normally, performing the regular cleanup for terminating programs by exit() function code example */
#include<iostream>
using namespace std;
int main()
{
int i;
cout<<"Enter a non-zero value: "; //user input
cin>>i;
if(i) // checks whether the user input is non-zero or not
{
cout<<"Valid input.\n";
}
else
{
cout<<"ERROR!"; //the program exists if the value is 0
exit(0);
}
cout<<"The input was : "<<i;
}
C++ Sample code Print first 100 "Ramanujan Numbers" by TWO WAYS 1st way is printing ramunajan numbers from RN taking RN from 0 to INFINITY & print first 100 numbers. 2nd
