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POno constructor could take the source type
 

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    <p>I keep getting the error no constructor could take the source type, or constructor overload resolution.</p> <p>At the beginning of my code i have declared an unordered map.</p> <pre><code>unordered_map&lt;char * , a_dictionary * &gt; Mymap; unsigned char hash[20]; char hex_str[41]; string answer, line; int yes=0; cout&lt;&lt;"Press 1 if you would like to use the default file(d8.txt) or press 2 if you want your own file"&lt;&lt;endl; getline(cin,answer); stringstream(answer)&gt;&gt; yes; if(yes == 1 ) { ifstream myfile("d8.txt"); if (myfile.is_open()) { while ( myfile.good() ) { getline (myfile,line); //cout&lt;&lt;line&lt;&lt;endl; a_dictionary * dic = new dictionary(); dic-&gt;word = line; const char * c= line.c_str(); sha1::calc(c,line.length(), hash); sha1::toHexString(hash,hex_str); Mymap.insert(hex_str, dic); // </code></pre> <p>THis line right here "mymap.insert" keeps giving me the error error C2664: 'std::_List_iterator&lt;_Mylist> std::_Hash&lt;_Traits>::insert(std::_List_const_iterator&lt;_Mylist>,_Valty) even though im passing the right values right?</p> <p>here is the function that call toHeXString</p> <pre><code>void toHexString(const unsigned char* hash, char* hexstring) { const char hexDigits[] = { "0123456789abcdef" }; for (int hashByte = 20; --hashByte &gt;= 0;) { hexstring[hashByte &lt;&lt; 1] = hexDigits[(hash[hashByte] &gt;&gt; 4) &amp; 0xf]; hexstring[(hashByte &lt;&lt; 1) + 1] = hexDigits[hash[hashByte] &amp; 0xf]; } hexstring[40] = 0; } </code></pre>
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