Storing values in arrays

[alyssnyx]

I'm am trying to get info from a file and put it into three arrays but it isn't working and I have no idea what is wrong.

#include <iostream>
#include <fstream>
#include <string>

using namespace std;



void sort(ifstream& infile){
int i=0;
string firstname,lastname,birthdate;
while(infile>>firstname>>lastname>>birthdate){

i++;

}

string firstname1[i],lastname2[i],birthdate3[i];
for (int j=0; j<i;j++)
{
    infile>>firstname1[j];
    infile>>lastname2[j];
    infile>>birthdate3[j];
    cout<<firstname1[j]<<lastname2[j]<<birthdate3[j]<<endl;
}

}
int main (){
string infile_name;
ifstream infile;

cout << "What file?";
cin>>infile_name;
infile.open(infile_name.c_str());

sort(infile);


}

[LB]

On lines 12-16, you read the entire file to the end. On line 18, you have three syntax errors. On lines 19-25, you use the same file stream that is already at the end of the file.

Use a std::vector.

[alyssnyx]

I need to use arrays. What are the syntax errors?

[MiiNiPaa]

Size of stack allocated arrays should be known at compile time, i.e. you can do this:

const int i = 10;
int array[i];

but not that:

int i;
std::cin >> i;
int array[i];

Name sort is misleading: it does not actually sorts anything.
Using parallel arrays is prone to errors, better to group your fields in struct and use single array.