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    <p>You have several issues, addressed below:</p> <pre><code>int main() { std::string line; std::ifstream infile ("Input.csv"); std::vector&lt;std::string&gt; table; while (std::getline(infile, line)) // this is the loop you want to read the file { std::istringstream iss(line); std::string word; while (std::getline(iss, word, ',')) // there are better ways to do this, but this will work { table.push_back(word); } } for(int index=0; index&lt;table.size(); ++index) // loop through the whole size { std::cout&lt;&lt; "Element" &lt;&lt; index &lt;&lt; ":" &lt;&lt; table[index] &lt;&lt; std::endl ; } infile.close(); return 0; } </code></pre> <p>Alternatively, you can avoid the use of nested while loops altogether:</p> <pre><code>struct csv_reader : std::ctype&lt;char&gt; { csv_reader() : std::ctype&lt;char&gt;(get_table()) {} static std::ctype_base::mask const* get_table() { static std::vector&lt;std::ctype_base::mask&gt; rc(table_size, std::ctype_base::mask()); rc['\n'] = std::ctype_base::space; rc[','] = std::ctype_base::space; return &amp;rc[0]; } }; int main() { std::string line; std::ifstream infile ("Input.csv"); csv_reader reader; infile.imbue(std::locale(std::locale(), &amp;reader); std::vector&lt;std::string&gt; table{std::istream_iterator&lt;std::string&gt;(infile), std::istream_iterator&lt;std::string&gt;()}; // or //std::vector&lt;std::string&gt; table; //std::copy(std::istream_iterator&lt;std::string&gt;(infile), std::istream_iterator&lt;std::string&gt;(), std::back_inserter(table)); for(int index=0; index&lt;table.size(); ++index) // loop through the whole size { std::cout&lt;&lt; "Element" &lt;&lt; index &lt;&lt; ":" &lt;&lt; table[index] &lt;&lt; std::endl ; } infile.close(); return 0; } </code></pre>
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    1. COIt worked fine but it is throwing following exception <br/> terminate called after throwing an instance of 'std::out_of_range' what(): vector::_M_range_check Aborted
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    2. COChange your output for loop to what I have (`index<table.size()`) instead of hardcording `11` as the stop condition. `std::vector::at()` does a range check and will throw if you attempt to access an element out of bounds (which apparently you are doing).
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