atoi does not work converting my cstring vector into ints.... why?

[DavidPeacock]

I have saved the contents of an int vector to a txt file and the numerical data was converted into a c-string. Nov
I need to import and read the contents back into my program but I have not been able to convert c-string numerical data back into ints. Can you help me out? Please....thank you.

[weaknessforcats]

Use a stringstream.

char* cstring = "1234";
    stringstream ss;
    ss << cstring;
    int fetch;
    ss >> fetch;
    cout << fetch << endl;

The cstring represents the char string in your text file. Just read the file and use the insertion operator to push the chsr data into the stringstream ss. Then simply use the extraction operator to pull the char out and convert it to an int.

You can add your own insertion/extraction operators so you can handle your own class types in the same manner as above.