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POMVS C++ error : string subscript out of range
 

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  1. POMVS C++ error : string subscript out of range
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    <p>I want to solve following task :</p> <p>There is given a text file "pesel.txt", which contains 150 national identities. Each line contains one national identity, which is a 11-digital number. First two digits from the left determine year, which a person was born in, next two digits determine month and next two determine day. </p> <p>To shorten :</p> <p>digits 0-1 = year digits 2-3 = month digits 4-5 = day digits 6-11 = determine something else, what is not important here</p> <p>I need to read the file, check how many people were born in december. I am trying to this in the following way :</p> <ul> <li>read each line until end of file is reached</li> <li>at each line I check whether third character in the string equals 1 and if fourth character equals 2, if yes I increment variable, that is my counter for people born in december, else next loop iteration is executed</li> </ul> <p>Here is the code :</p> <pre><code>int _tmain(int argc, _TCHAR* argv[]) { ifstream file( "C:\\Kuba\\Studia &amp; Nauka\\MATURA XDDD \\INFA\\1\\Dane_PR\\pesel.txt" ); string line; int bornInDecember=0; if( !file.is_open() ){ cout &lt;&lt; "Cannot read the file." &lt;&lt; endl ; }else{ while( file.good() ){ getline( file, line ); if( line[2] == '1' &amp;&amp; line[3] == '2' ){ bornInDecember++ ; // 0-1 year, 2-3 month, 4-5 day } } cout &lt;&lt; "Amount of people born in december : "&lt;&lt; bornInDecember&lt;&lt; endl; file.close(); } system("pause"); return 0; } </code></pre> <p>the problem is that I get the following error and I've no idea why..</p> <p><a href="http://img10.imageshack.us/i/mvserr.png/" rel="nofollow">http://img10.imageshack.us/i/mvserr.png/</a></p>
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