In C Running the below program with the given input causes a

In C++ Running the below program with the given input causes an error when extracting an integer from a stringstream. The program reads from cin the following rows (also called records) that contain a last name, first name, department, and annual salary. The program uses the stringstream to convert the last entry for the salary to an integer. Argon,John,Operations,50000 Williams,Jane,Marketing,sixty_thousand Uminum,Al,Finance,70000 Jones,Ellen,Sales,80000 Note that the second row has a value that is type string, not type int, which will cause a problem. Run the program and note the program fails and throws an ios_base::failure exception. Add try/catch statements to catch the ios_base::failure exception. In this case, print a message, and do not add the item to the total salaries. Run the program again and note the total salaries excludes the row with the error.

#include <iostream>
#include <vector>
#include <string>
#include <sstream>
#include <stdexcept>
using namespace std;

int main() {
// Describe the format of a row of input. There are four fields in
// a row separated by commas: last name, first name, department, salary
const string SEPARATOR = \",\"; // field separator in each row of data
const int INDEX_LAST_NAME = 0; // # of the last name field
const int INDEX_FIRST_NAME = 1; // # of the first name field
const int INDEX_DEPT = 2; // # of the department name field
const int INDEX_SALARY = 3; // # of the salary field
stringstream ss; // For conversion of string to int
int salary = 0;

vector<string> field; // Fields on one row in the input file
string row; // One row of the input file
string partial;
int nRows = 0; // Counts # of rows in the input file
int totalSalaries = 0; // Total of all salaries read

ss.exceptions(ios::failbit); // Failed convertion will throw an
// ios_base::failure

getline(cin, row);
while (row.length() > 0) { // Loop while input data exists
++nRows;
while(row.find(\',\') != string::npos) {
partial = row.substr(0, row.find(\',\'));
field.push_back(partial);
row = row.substr(row.find(\',\') + 1);
}
field.push_back(row);
  
// FIXME: Add a try/catch clause to catch an ios_base::failure exception.
// Show the user the row that had the problem and indicate
// there was a conversion error on the salary.

ss.str(\"\"); // Reset contents of stringstream
ss.clear(); // Clear stringstream state
ss << field[INDEX_SALARY];
ss >> salary;
totalSalaries += salary;
  
cout << \" \" << field[INDEX_FIRST_NAME] << \", \" << field[INDEX_LAST_NAME]
<< \", \" << field[INDEX_SALARY] << \", \" << field[INDEX_DEPT] << endl;
  
getline(cin, row);
field.clear();
}

cout << endl;
cout << \"Total salaries: \" << totalSalaries << \".\" << endl;

return 0;
}

Solution

try

{getline(cin, row);
while (row.length() > 0) { // Loop while input data exists
++nRows;
while(row.find(\',\') != string::npos) {
partial = row.substr(0, row.find(\',\'));
field.push_back(partial);
row = row.substr(row.find(\',\') + 1);
}
field.push_back(row);
  
// FIXME: Add a try/catch clause to catch an ios_base::failure exception.
// Show the user the row that had the problem and indicate
// there was a conversion error on the salary. ss.str(\"\"); // Reset contents of stringstream
ss.clear(); // Clear stringstream state
ss << field[INDEX_SALARY];
ss >> salary;

}

catch(\"illegal exception,cannot convert to int\");

}