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quick_exit() function in C++ with Examples
In this article we will be discussing the working, syntax and examples of quick_exit() function in C++ STL.
What is quick_exit()?
quick_exit() function is an inbuilt function in C++ STL, which is defined in the <cstdlib> header file. quick_exit() function is used to quickly terminate the calling process means it terminates the process without cleaning of its resources.
This function is used for normal termination and no additional cleanup tasks are being performed like, no object destructors are called, whereas the C streams are closed or flushed, the files which are opened with tmpfile are being removed.
When we terminate a process using quick_exit() then a status is returned to the host environment,
- If the status is zero or EXIT_SUCCESS, means the termination was successful
- If the status is EXIT_FAILURE , means the termination was not successful or unsuccessful.
Syntax
void quick_exit( int status );
Parameters
The function accepts following parameter(s) −
- status − It is the termination status if 0 or EXIT_SUCCESS then termination was successful else if it is EXIT_FAILURE then the termination was unsuccessful.
Return value
This function returns nothing
Example
Input
printf(“Before exit”); quick_exit(EXIT_SUCCESS); printf(“After Exit”);
Output
Before exit
Example
#include <bits/stdc++.h>
using namespace std;
void exit_func1(){
cout << "This is exit function 1" << endl;
}
void exit_func2(){
cout << "This is exit function 2" << endl;
}
void exit_func3(){
cout << "This is exit function 3" << endl;
}
void exit_func4(){
cout << "This is exit function 4" << endl;
}
int main(){
at_quick_exit(exit_func1);
at_quick_exit(exit_func2);
at_quick_exit(exit_func3);
at_quick_exit(exit_func4);
quick_exit(0);
return 0;
}Output
This is exit function 4 This is exit function 3 This is exit function 2 This is exit function 1
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