Home » C++ programming language

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

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.

Sample Input and Output

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

Example

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

Reference: C++ exit() function