Vector to Struct

[deadmittens]

I have this section for a program I'm working on where I am inputting into a vector within a structure. The syntax all seems correct, but I get this weird error I've never seen before.

(I'm using XCode)
It reads: Thread 1:EXC_BAD_ACCESS (code=1, address 0x0)

I've done a little reading, and I guess this has something to do with memory, but I'm too new at this to fully understand this.

#include <vector>

struct fileSave
{
    vector<string> date;
}

int main ()
{
fileSave receipt;

//receipt.trip is defined earlier in the code and works fine
for (int i=0; i<receipt.trip; i++)
        {
            cout<<"Input date (mm/dd/yy): ";
            cin>>receipt.date[i];
        }

}

Is there a way to change the syntax or logic to avoid this type of error?

[jlb]

You can't use the operator[] with an empty vector, instead use a temporary variable to get the input from the user then push the value into the vector.

By the way that snippet shouldn't compile because of a missing semicolon that terminates the structure definition.

[deadmittens]

@jib, you're right. The semicolon is present in the original code, I just forgot to add it back in here afterward.

I did something simple like this:

int main()
{
string y;
fileSave receipt;

for (int i=0; i<receipt.trip; i++)
        {
            cout<<"Input date (mm/dd/yy): ";
            cin>>y;
            
            receipt.date[i]=y;
        }
}

But I still get the same error. Any other ideas? Thanks

[jlb]

What part of:

You can't use the operator[] with an empty vector, instead use a temporary variable to get the input from the user then push the value into the vector.

Did you not understand?

[xismn]

Deadmittens,

You've misunderstood what jlb was tring to convey. Something like this:

#include <iostream>
#include <string>
#include <vector>

struct FileSave {
	std::vector<std::string> dates;
};

int main() {

	FileSave receipt;

	const int number_of_receipts = 2;
	for (int i = 0; i < number_of_receipts; ++i) {

		std::string date;

		std::cout << "Input date (mm/dd/yy): ";
		std::cin >> date;

		receipt.dates.push_back(date);

	}

	return 0;
}

[deadmittens]

@jin, wasn't aware of push_back, must've missed it in my reading.

@xismn, thanks for the clarification.

It works now, thank you both.

[yushi170]

priority_queue< ClTableau, deque<ClTableau>, less<ClTableau> > priority ;
vector<ClTableau>ptrTableau;
list<int> liste;
list<int>::iterator it;

//Ajouter un element apres une position donnee

cout<<"Entrez une position : ";
cin>>position;
cout<<"Entrez un nombre : ";
cin>>nbr;

it = liste.begin();

for(int ctr = 0;ctr<position;ctr++){

it++;
}

liste.insert(it,nbr);



for(auto it = map.cbegin(); it != map.end(); it++)
cout<<"Nom complet : "<<(*it).first<< endl<<"numero de telephone : "
<<(*it).second<<endl;



map[nomComplet] = numero;