Question

Please help I am confused to where start. It C++ program thank you

The stoi function converts a string to an integer, but does not check whether or not the value of the string is a good integer. If the stoi function fails, an exception is thrown and the program terminates.

Write a program that asks the user to enter two strings, one called sNumerator and the other sDenominator. Using the stoi function, convert the two strings to numbers but individually catch any exceptions and send a message back to the user that the numbers they entered were not valid. If both convert successfully to numbers, divide the numerator by the denominator and catch the exception where the denominator is zero. (You CANNOT check for zero using an if statement before doing the calculation). If the exception is thrown, notify the user that you cannot divide by zero otherwise display the calculated fraction.

Answer 1

#include<iostream>
using namespace std;
int main() {

string sNumerator;
string sDenominator;
cin >> sNumerator >> sDenominator;
int iNumerator;
int iDenominator;
  
try { //try_1

iNumerator = stoi(sNumerator);
iDenominator = stoi(sDenominator);

try { //try_2
float result = (float)iNumerator / iDenominator ;
cout << "The Result of the Division is " << result << endl;
}   
catch(exception& e) { //catch_2
cout << "Cannot Devide by Zero" << endl;
}
}
catch(exception& e) { //catch_1
cout << "The Numbers you Entered is not Valid" << endl;
}

return 0;
}

/*Note that In C++ the Exception is not thrown when we try to divide by zero but if you want to throw an Exception you can do so externally. below is the code for that */

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

float CheckDenominator(float denominator)
{
// if denominator is zero
// throw exception
if (denominator == 0)
{
throw runtime_error("Math error: Attempted to divide by zero\n");
}
else
return denominator;
} // end CheckDenominator

int main()
{

string sNumerator;
string sDenominator;
cin >> sNumerator >> sDenominator;
int iNumerator;
int iDenominator;

try
{ //try_1

iNumerator = stoi(sNumerator);
iDenominator = stoi(sDenominator);

try
{ //try_2
float result = (float)iNumerator / CheckDenominator(iDenominator);
cout << "The Result of the Division is " << result << endl;
}
catch (exception &e)
{ //catch_2
cout << "Cannot Devide by Zero" << endl;
}
}
catch (exception &e)
{ //catch_1
cout << "The Numbers you Entered is not Valid" << endl;
}

return 0;
}

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