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exit() Function with Example in C++

C++ exit() function: Here, we are going to learn about the exit() function with example of cstdlib header in C++ programming language.
Submitted by IncludeHelp, on May 28, 2020

C++ exit() function

exit() function is a library function of cstdlib header. It is used to terminate the calling process, it accepts a status code/value (EXIT_SUCCESS or EXIT_FAILURE) and terminates the process. For example – while working with the files, if we are opening a file and file does not exist – in this case, we can terminate the process by using the exit() function.

Syntax of exit() function:

C++11:

    void exit (int status);

Parameter(s):

status – represents the exit status code. 0 or EXIT_SUCCESS indicates the success i.e. the operation is successful, EXIT_FAILURE indicates the failure i.e. the operation is not successfully executed.

Return value:

The return type of this function is void, It does not return anything.

Example:

    Function call:
    exit(EXIT_FAILURE);
    //or
    exit(EXIT_SUCCESS);

C++ code to demonstrate the example of exit() function

// C++ code to demonstrate the example of
// exit() function

#include <iostream>
#include <cstdlib>
using namespace std;

// main() section
int main()
{
    float n; // numerator
    float d; // denominator
    float result;

    cout << "Enter the value of numerator  : ";
    cin >> n;
    cout << "Enter the value of denominator: ";
    cin >> d;

    if (d == 0) {
        cout << "Value of denominator should not be 0..." << endl;
        exit(EXIT_FAILURE);
    }

    cout << n << " / " << d << " = " << (n / d) << endl;

    return 0;
}

Output

RUN 1:
Enter the value of numerator  : 10
Enter the value of denominator: 0
Value of denominator should not be 0...

RUN 2:
Enter the value of numerator  : 10
Enter the value of denominator: 3
10 / 3 = 3.33333