Days between dates challenge - last test case fails.

Question

Ok, so this piece of code is a little messy maybe but it works in almost all the cases, except the last one. I cannot figure out why.
Who can help me? Thanks in advance :)

/*
Unfortunately, the last TEST CASE does not work.
By the way, any cool hints on how I could improve the code is highly appreciated.
I know it seems a bit 'messy' or 'wordy'...
*/

#include <algorithm>
#include <iostream>
#include <map>
#include <sstream>
#include <string>
#include <vector>
#include <cmath>

//function to check leap year
bool leap(const int &year)
{
return (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0));
}

//check days between the two dates - careful: leap years!!

int main()
{
//create map of months with int
std::map<std::string, size_t> map{{"January", 1},
{"February", 2},
{"March", 3},
{"April", 4},
{"May", 5},
{"June", 6},
{"July", 7},
{"August", 8},
{"September", 9},
{"October", 10},
{"November", 11},
{"December", 12}};

std::vector<int> daysInMonths{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

//input for example purposes
// std::string str1 = "September 14, 1975";
// std::string str2 = "October 20, 2008";

std::string str1 = "July 14, 1985";
std::string str2 = "December 15, 2008";

//code challenge
// std::string str1;
// std::getline(std::cin, str1);
// std::string str2;
// std::getline(std::cin, str2);

//Output = 1209-

std::vector<int> vec1;
std::vector<int> vec2;
std::stringstream ss1(str1);
std::stringstream ss2(str2);
std::string te

Answer 1

Smith Welder Thanks. This is a good idea too but it completely changes my idea ;)

Answer 2

https://en.wikipedia.org/wiki/Julian_day
formulas for this have long been invented.. 👍

P. s. I just showed for you how it to do. When you programming something, use algorithms and formulas. Keep learning..

Answer 3

Smith Welder Ok. Will do next time ;) I just wanted to implement my own approach and make it work.

Answer 4

https://code.sololearn.com/cD2TpE4C1Lf0/?ref=app
There is two ways how to do it👇