c++ - getline() not opening text file -

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hi using codeblocks 13.12 on osx.

i trying open following .txt file

line 1
line 2
line 3

my code just: 

#include <iostream> #include <fstream> #include <string>  using namespace std;  int main() {     cout<<'\n';     std::string line;     ifstream myfile("textex.txt");     if(myfile.is_open())         cout << "file open";     else         cout << "file not open";      cout<<'\n';     return 0; }

i have included file in project folder , have tried linking , compiling it.

when run code, displays"file not open" , i'm not sure why? i'm new c++, can please explain why isn't working?

instead of 

    ifstream myfile("textex.txt");

try

    ifstream myfile;     myfile.open("/users/name/code/textex.txt"); // use full path

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