Using a for loop to modify string name when reading data - c++

Question

The idea of this part of my code is relatively simple; I am doing a for loop that iterates over some range of integers, and the value of the iteration is placed within a number to string conversion and then called within the for loop to read a data file.
The code snippet:
for (int z = 11; z < 33; z++) {
const std::string filename_1 = "detection";
int value = z;
std::string filename_2;
std::ostringstream convert;
convert << value;
filename_2 = convert.str();
const std::string filename_3 = ".rat";
const std::string my_file = filename_1 + filename_2 + filename_3;
// Reading data from the .rat files of the detected signal.
Reading(my_file, times_det, signal_det);
// Further calculations go here.
The code compiles and executes, but after reading out two results of the calculations I am returned with the error:
./test
0.527679
0.639159
*** Error in `./test': double free or corruption (out): 0x0000000000f52a30 ***
Aborted (core dumped)
Am I not clearing memory where is necessary? Using .clear() did not remove this issue.
Thank you for the advice!
EDIT: The function 'Reading' for clarity:
void Reading(const std::string &filename, rarray<double,1> &times, rarray<std::complex<double>,1> &signal) {
std::ifstream f(filename.c_str());
// Read in the signal.
f >> times;
f >> signal;
}

Answer 1

#kam, I tried to reproduce the issue by using the following code and I am suspecting that it may have to do with the rarrays that you are using, but commented out as I don't have the details of the library you are using.
#include <iostream>
#include <fstream>
#include <strstream>
#include <sstream>
using namespace std;
void Reading(const std::string &filename, /*rarray< */double /*,1> */ &times, /* rarray<std::complex< */ double /*>,1> */ &signal) {
std::ifstream f(filename.c_str());
// std::ifstream f;
std::string ofile = "o_" + filename;
std::ofstream o;
//f.open(filename.c_str());
o.open(ofile.c_str());
// Read in the signal.
f >> times;
f >> signal;
cout << "file open :" << f.is_open() << " ";
cout << times << " " << signal << endl << flush;
//o << "file open :" << f.is_open() << " ";
o << times << " " << signal << endl << flush;
//f.close();
o.close();
}
int main(int argc, const char * argv[]) {
const std::string filename_1 = "detection";
const std::string filename_3 = ".rat";
double times_det = 0.0, signal_det = 0.0;
for (int z = 11; z < 33; z++) {
int value = z;
std::string filename_2;
std::ostringstream convert;
convert << value;
filename_2 = convert.str();
const std::string my_file = filename_1 + filename_2 + filename_3;
// Reading data from the .rat files of the detected signal.
Reading(my_file, times_det, signal_det);
// Further calculations go here.
}
return 0;
}