Parsing Dates C++

Question

Complete main() to read dates from input, one date per line. Each date's format must be as follows: March 1, 1990. Any date not following that format is incorrect and should be ignored. Use the substr() function to parse the string and extract the date. The input ends with -1 on a line alone. Output each correct date as: 3/1/1990.

Ex: If the input is:

March 1, 1990

April 2 1995

7/15/20

December 13, 2003

-1

then the output is:

3/1/1990

12/13/2003

Answer 1

using namespace std;

#include <iostream>

#include <fstream>

#include <string>

#include <string.h>

#include <stdlib.h>

#include <vector>

#include <ctype.h>

typedef struct _TDate

{

int month;

int year;

int day;

} *TDate;

int MonthNum(string monthName)

{

int iReturn=0;

if (monthName.compare("JANUARY"))

{

iReturn=1;

}

if (monthName.compare("FEBRUARY"))

{

iReturn=2;

}

if (monthName.compare("MARCH"))

{

iReturn=3;

}

if (monthName.compare("APRIL"))

{

iReturn=4;

}

if (monthName.compare("MAY"))

{

iReturn=5;

}

if (monthName.compare("JUNE"))

{

iReturn=6;

}

if (monthName.compare("JULY"))

{

iReturn=7;

}

if (monthName.compare("AUGUST"))

{

iReturn=8;

}

if (monthName.compare("SEPTEMBER"))

{

iReturn=9;

}

if (monthName.compare("OCTOBER"))

{

iReturn=10;

}

if (monthName.compare("NOVEMBER"))

{

iReturn=11;

}

if (monthName.compare("DECEMBER"))

{

iReturn=1;

}

return(iReturn);

}

bool IsLeapYear (int year)

{

bool boolReturn=false;

if (year%4==0)

{

boolReturn = (year%400!=0);

}

return(boolReturn);

}

void Uppercase(char * str)

{

int n=strlen(str);

for (int iLoop=0; iLoop<n; iLoop++)

{

str[iLoop]= toupper(str[iLoop]);

}

}

int validDate(TDate dateRec)

{

int iReturn=0;

if ((dateRec->day<1) || (dateRec->month<1) || (dateRec->year<1) || (dateRec->day>31) || dateRec->month>12)

{

iReturn=-1;

}

else

{

switch (dateRec->month)

{

case 4:

case 9:

case 6:

case 11:

{

if (dateRec->day >30)

{

iReturn -= 2;

}

break;

}

case 2:

{

if (IsLeapYear(dateRec->year))

{

if (dateRec->day>29)

{

iReturn-=3;

}

}

else

{

if (dateRec->day>28)

{

iReturn-=3;

}

}

break;

}

default:

{

if (dateRec->day>31)

{

iReturn=-4;

}

}

} //switch

}

return(iReturn);

}

int parseDate(string dateStr, TDate dateRec)

{

int iReturn=0;

char monthStr[25];

char dayStr[25];

char yearStr[25];

char monthDayStr[255];

int commaPos = dateStr.find(",");

if (commaPos>-1)

{

strcpy(monthDayStr,

dateStr.substr(0,commaPos-1).c_str()

);

strcpy(monthStr,strtok(monthDayStr," /t"));

strcpy(dayStr,strtok(NULL," \t"));

Uppercase(monthStr);

strcpy(yearStr,

dateStr.substr(commaPos+1).c_str()

);

//cout << " month >" << monthStr << "<" << endl;

//cout << " day >" << dayStr << "<" << endl;

//cout << " year >" << yearStr << "<" << endl;

dateRec->month = MonthNum(monthStr);

dateRec->day = atoi(dayStr);

dateRec->year = atoi(yearStr);

}

else

{

iReturn=-1;

}

return(iReturn);

}

Go()

{

string inbuff="?";

struct _TDate dateRec;

vector<struct _TDate> vecDates;

while (inbuff.compare("-1"))

{

cout << "input the date :>";

getline(cin,inbuff);

if (parseDate(inbuff,&dateRec)==0)

{

if (validDate(&dateRec)==0)

{

vecDates.push_back(dateRec);

}

}

}

int n=vecDates.size();

for (int iLoop=0; iLoop<n; iLoop++)

{

struct _TDate curDate;

curDate = vecDates[iLoop];

cout << curDate.month << "/" << curDate.day << "/" << curDate.year << endl;

}

}

int main()

{

Go();

}