Program never gets to the part where I can input information - c++

Question

When I run the program the output window prints out the line "! Loading Data..." but it seems it's stuck in a loop endlessly. As far as I can tell the while loop is set up correctly, but after plugging away I am at a loss.
ifstream myfile("Data.CS.txt");
if (!myfile) { //Always test the file open.
cout << "Error opening output file" << endl;
system("pause");
return -1;
}
cout << endl;
cout << "! Loading Data...";
while (getline(myfile, line)) {
string delimiter = "|";
string delimiter2 = "-=>";
size_t pos = 0;
string tempLine;
string tokenName;
string token;
string token2;
vector <string> storeTokenPairs;
tokenName = line.substr(0, pos);
tempLine = line.erase(0, pos + delimiter.length());
while ((pos = tempLine.find(delimiter2)) != string::npos) {
token = tempLine.substr(0, pos);
storeTokenPairs.push_back(token);
line.erase(0, pos + delimiter2.length());
}
for (int i=0; i<storeTokenPairs.size(); i++)
dictionary.emplace(tokenName, make_pair(storeTokenPairs[i], storeTokenPairs[i+1]));
}

Answer 1

The following line of code is wrong:
while ((pos = tempLine.find(delimiter2)) != string::npos) {
token = tempLine.substr(0, pos);
storeTokenPairs.push_back(token);
line.erase(0, pos + delimiter2.length()); // <-- HERE
}
You are never modifying tempLine, so the loop runs endlessly if delimiter2 is found in tempLine.
You need to replace line with tempLine instead:
tempLine.erase(0, pos + delimiter2.length());
Alternatively, you don't actually need to modify tempLine at all, as find() takes an optional start index as input:
size_t start = 0, pos;
while ((pos = tempLine.find(delimiter2, start)) != string::npos) {
token = tempLine.substr(start, pos-start);
storeTokenPairs.push_back(token);
start = pos + delimiter2.length();
}
if (start < tempLine.length()) {
token = tempLine.substr(start);
storeTokenPairs.push_back(token);
}