I'm not sure what's wrong

Question

Why doesn't my code check for the last 2 cases in Convert US date to EU date challenge?

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

int main() {
string a;
getline(cin,a);
if(a[a.length()-5]=='/'){
stringstream s(a);
vector <string> v;
string b;
while(getline(s,b,'/')){
v.push_back(b);
}
cout<<v[1]<<'/'<<v[0]<<'/'<<v[2];
}else{
stringstream s(a);
string b,c,d;
s>>b>>c>>d;
c.erase(c.length()-1);
string month1[]= {"January","February","March","April","May","June","July","August","September","October","November","December"};
string month2[]= {"1","2","3","4","5","6","7","8","9","10","11","12"};
for(int i=0; i<12; i++){
if(b==month1[i]){
b=month2[i];
}
}
cout<<b<<'/'<<c<<'/'<<d;
}
return 0;
}

Answer 1

I tested your code with May 1, 2020.
It printed:
5/1/2020

Whereas it should print:
1/5/2020.

Answer 2

check your cout

Answer 3

Abbas Maatouk
if you want a shorter version, take advantage of c++'s other libraries.

stringstream and iomanip can be pretty convenient. tm is the struct to use when working with date and time.

Dig deeper into C++. From the code you wrote, I feel you already have the basics well covered 😎.

This is the code I used:

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

int main() {

string inpt;
getline(cin, inpt);
stringstream ss(inpt);

tm t{};
if(inpt.find(',')<string::npos)
ss >> get_time(&t, "%B %d, %Y");
else
ss >> get_time(&t, "%m/%e/%Y");

cout << (t.tm_mday)<<'/'<<(1+t.tm_mon) <<'/'<<(1900+t.tm_year)<<endl;

}

/*
Sample input:

---------------------

December 25, 1975
submit

expected output:
25/12/1975

---------------------

3/1/1870
submit

expected output:
1/3/2870
*/

Answer 4

Brian's right.
you should reverse the day and month at the end of your code

cout<<c<<'/'<<b<<'/'<<d;

Answer 5

Peter mwangi