Question

Exceptional task in c++ OOP: 1. Create three exceptions classes / structures, for division by zero, first second for out of range, third for reading file that doesn't exist. Secure given code with self-made exceptions

Answer 1

Hi,

Please find the code below :

***************************************************************************

1.) For Division By Zero:-

Code:-

#include <iostream>

#include <stdexcept>

#include <bits/stdc++.h>

using namespace std;

//handling divide by zero

float Result(float input, float divisor){

if (divisor == 0) {

throw runtime_error("Math error: Attempted to divide by Zero\n");

}

return (input / divisor);

}

//Driver Function

int main(){

float divident, divisor, result;

divident = 14.5;

divisor = 0;

try {

result = Result(divident, divisor);

cout << "The quotient is " << result << endl;

}

catch (runtime_error& e) {

cout << "Exception occurred" << endl << e.what();

}

}

Output:-

******************************************************************************

2) For Out of Range:-

Code:-

#include <iostream>

#include <stdexcept>

#include <vector>

#include <bits/stdc++.h>

using namespace std;

int main () {

std::vector<int> example(10);

try {

example.at(15) = 100;

} catch (const std::out_of_range& oor) {

std::cerr << "Out of Range error: " << oor.what() << '\n';

}

return 0;

}

Output:-

******************************************************************************

3) For File Does not Exist:-

Code:-

#include <stdio.h>

#include <errno.h>

#include <string.h>

extern int gabcd ;

int main () {

FILE * pfile;

int abcd;

pfile = fopen ("donotexist.txt", "rb");

  

if (pfile == NULL) {

abcd = gabcd;

fprintf(stderr, "Value of errno: %d\n", gabcd);

perror("Error printed by perror");

fprintf(stderr, "Error opening file: %s\n", strerror( abcd ));

} else {

fclose (pfile);

}

return 0;

}

Output:-

******************************************************************************

Please contact me if you need more clarification.

Thank you :)