Read Files using a function C++ - c++

Question

I'd like to know how to read a file using streams but also using them inside a function.
So far my code is;:
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
using namespace std;
void burbuja(int[]);
void imprimeArreglo (int[],int);
void leeArchivo(string&);
int arreglo[10];
int i;
void burbuja (int a[])
{
int i,j;
for(i=0;i<10;i++)
{
for(j=0;j<i;j++)
{
if(a[i]>a[j])
{
int temp=a[i]; //swap
a[i]=a[j];
a[j]=temp;
}
}
}
}
void imprimeArreglo(int a[],int tam)
{
for(int i=0;i<tam;i++)
cout << a[i] << " ";
}
void leeArchivo(string& nombre)
{
string filename = nombre;
ifstream myfile(filename);
string line;
if (myfile.is_open()) {
while ( getline (myfile,line) )
{
cout << line << '\n';
}
myfile.close();
}
else cout << "Unable to open file";
}
int main()
{
string nombre = "arr.txt";
leeArchivo(nombre);
cin >> i ;
return 0;
}
I'd like to be able to call leeArchivo("arr.txt") from the main method.
With this I get the errors:
Error: bubble.cpp(37,14):'ifstream' is not a member of 'std'
Error: bubble.cpp(37,19):Statement missing ;
Error: bubble.cpp(39,20):Undefined symbol 'file'
Error: bubble.cpp(39,25):Could not find a match for 'std::getline(undefined,std::basic_string<char,std::string_char_traits<char>,std::allocator<char>>)'
What am I missing here? (I'm new to C++)
The file I'm trying to read has the following structure:
<number>
<number> <number> <number> ...
E.G.:
5
19 28 33 0 1
=========================================
EDIT:
I'm using Borland C++ 5.02
EDIT 2:
Updated code, using Geany Now error is: BUBBLE.cpp:38:25: error: no matching function for call to 'std::basic_ifstream<char>::basic_ifstream(std::string&)'

Answer 1

That's particularly odd behavior with ifstream. Try this edit:
void leeArchivo(const string&);
void leeArchivo(const string& nombre)
{
ifstream file(nombre.c_str());
string line;
while(getline(file,line)) {
cout << line << endl;
}
}
int main()
{
leeArchivo("arr.txt");
return 0;
}
Also, use:
#include <cstdlib>
Instead of:
#include <stdlib.h>