Question

Language is C++

I am reading in data from a file.

In the .txt file is a series of dates.

I need help converting dates from the format "20-Apr-18" to the standard "4/20/18"

I've gotten the rest taken care of, I just need help converting the dates from the file. Thank you.

Answer 1

Program to convert the Format of date:

#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;

int main() {
int sum , i = 0;
string word;
ifstream inFile;

// Name of the months associated with its index value in the array.
string months [12] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
inFile.open("test.txt");
if (!inFile) {
cout << "Unable to open file";
exit(1); // terminate with error
}  
// moving the file value to the variable word.
while (inFile >> word)

// Extracting month, date, year from the given format.
{
string date = word.substr(1, 2);
string year = word.substr(8, 2);
string month = word.substr(4, 3);
for (i=0; i < 12; i++){
if (months[i] == month)
{

// converting the integer index value to string, to concatenate with year and month.
string str= to_string(i);

// concatenating the year, month and date.
cout << str + "/" + date + "/" + year;
cout << "\n";
}
  
}
}
  
inFile.close();

return 0;
}

Sample File content:

File Name : test.txt

"20-Apr-18
"20-Jul-18
"20-Aug-18
"20-Sep-18
"20-Nov-18

Output:

InputTextFile: