C++: Redo Programming Exercise 7 of Chapter 7 so that your program handles exceptions such as division by zero and invalid input. Your program should print Denominator must be nonzero and reprompt for a valid denominator when 0 is entered for a denominator.

main.cpp is given:

#include

using namespace std;

void addFractions(int num1, int num2, int den1, int den2,

int& numfrac, int& denfrac);

void subtractFractions(int num1, int num2, int den1, int den2,

int& numfrac, int& denfrac);

void multiplyFractions(int num1, int num2, int den1, int den2,

int& numfrac, int& denfrac);

void divideFractions(int num1, int num2, int den1, int den2,

int& numfrac, int& denfrac);

void menu();

void getFraction(int choice,int fractNo, int& numerator, int& denominator);

void showResult(char operation, int num1, int num2, int den1, int den2,

int numfrac, int denfrac);

int main()

{

int numerator1, numerator2, denominator1, denominator2;

int resultnum, resultdeno;

int choice;

menu();

cin >> choice;

while (choice != 9)

{

cout << "For fraction 1" << endl;

getFraction(choice, 1, numerator1, denominator1);

cout << endl;

cout << "For fraction 2" << endl;

getFraction(choice, 2, numerator2, denominator2);

cout << endl;

switch (choice)

{

case 1:

addFractions(numerator1, numerator2,

denominator1, denominator2,

resultnum, resultdeno);

showResult('+', numerator1, numerator2,

denominator1, denominator2,

resultnum, resultdeno);

break;

case 2:

subtractFractions(numerator1, numerator2,

denominator1, denominator2,

resultnum, resultdeno);

showResult('-', numerator1, numerator2,

denominator1, denominator2,

resultnum, resultdeno);

break;

case 3:

multiplyFractions(numerator1, numerator2,

denominator1, denominator2,

resultnum, resultdeno);

showResult('*', numerator1, numerator2,

denominator1, denominator2,

resultnum, resultdeno);

break;

case 4:

divideFractions(numerator1, numerator2,

denominator1, denominator2,

resultnum, resultdeno);

showResult('/', numerator1, numerator2,

denominator1, denominator2,

resultnum, resultdeno);

break;

default:

cout << "Invalid selection." << endl;

}

menu();

cin >> choice;

}

return 0;

}

void addFractions(int num1, int num2, int den1, int den2,

int& numfrac, int& denfrac)

{

numfrac = num1 * den2 + num2 * den1;

denfrac = den1 * den2;

}

void subtractFractions(int num1, int num2, int den1, int den2,

int& numfrac, int& denfrac)

{

numfrac = num1 * den2 - num2 * den1;

denfrac = den1 * den2;

}

void multiplyFractions(int num1, int num2, int den1, int den2,

int& numfrac, int& denfrac)

{

numfrac = num1 * num2;

denfrac = den1 * den2;

}

void divideFractions(int num1, int num2, int den1, int den2,

int& numfrac, int& denfrac)

{

numfrac = num1 * den2;

denfrac = num2 * den1;

}

void menu()

{

cout << "This program performs operations on fraction. Enter"

<< endl;

cout << "1 : To add fraction" << endl;

cout << "2 : To subtract fraction" << endl;

cout << "3 : To multiply fraction" << endl;

cout << "4 : To divide fraction" << endl;

cout << "9 : To exit the program" << endl;

}

void getFraction(int choice, int fractNo, int& numerator, int& denominator)

{

cout << "Enter the numerator: ";

cin >> numerator;

cout << endl;

if (choice == 4 && fractNo == 2 && numerator == 0)

{

cout << "To divide, the second fraction must be nonzero."

<< endl;

while (numerator == 0)

{

cout << "Enter a nonzero number for the numerator: ";

cin >> numerator;

cout << endl;

}

}

cout << "Enter the denominator: ";

cin >> denominator;

cout << endl;

}

void showResult(char operation, int num1, int num2, int den1, int den2,

int numfrac, int denfrac)

{

cout << num1 << "/" << den1;

switch (operation)

{

case '+':

cout << " + ";

break;

case '-':

cout << " - ";

break;

case '*':

cout << " * ";

break;

case '/':

cout << " / ";

break;

default:

cout << "Invalid operation." << endl;

}

cout << num2 << "/" << den2 << " = " << numfrac << "/"

<< denfrac << endl;

}

I need divisionByZero.h also.