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  1. PO
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    <p>You are missing a few curly braces in your read function.</p> <p>I redid it here:</p> <pre><code> void read(char &amp;readStatus, char &amp;var, bool &amp;varStatus) { term t; // term variable to push it into the list of terms char c, lc, sign; // c = current char, lc = lastchar and sign the '+' or '-' sign before a coefficient int coef, pow; //variables to pass the coef and power to term t bool coefRead = false, powRead = false; //reading status of coef and power while (c != '\r') { //we read characters until carriage return c = getch(); // get the new imputed char if (tolower(c) == 'r' || tolower(c) == 'q') { //if the user inputed r or q we reset the input or quit the program readStatus = c; //pass current char value to readStatus so the program will know what to do next return; //aborting the reading process } else { if (printable(c)) cout &lt;&lt; c; //print on screen only the correct characters if (!coefRead &amp;&amp; !powRead) //we set term coef to the inputed value { if (isdigit(c)) { if (isdigit(lc)) coef = coef * 10 + int(c); //if the last char was also a digit we multiply the last value of coef by 10 and add current char else { if (sign == '-') coef = -(int(c));//if the current coef has '-' before we set coef to it's negative value else coef = int(c); //this means a new term's coef is read } //end else }//end if isdigit(c) if (!isdigit(c) &amp;&amp; isdigit(lc)) coefRead = true; //if the last char was a digit and we reached the var name we stop reading the coefficient } //end if else if (coefRead &amp;&amp; !powRead) //after coefficient is read we get the term's varname and power { if (isdigit(c)) { // just like in the case with coefficient we read the power until the current char is not a digit if (isdigit(lc)) pow = pow * 10 + int(c); else pow = int(c); } else if (isalpha(c) &amp;&amp; isdigit(lc) &amp;&amp; !varStatus) { //if the last char was a digit and the current not we reached the var name var = c; //also even though the variable is inputed more than once we save it only once varStatus = true; //we mark the var name as read } else { if (isdigit(lc)) powRead = true; } } //end else if else { if (c == '+' || c == '-') { // if a sign was inputed it means a new term is coming and we push the current term to the list and reset t.coef = coef; // coefRead and powRead so we can read another term t.pow = pow; poly.push_back(t); sign = c; coefRead = false; powRead = false; } } lc = c; // we save the last character } //end else } //end while } //end function </code></pre> <p><strong>EDIT</strong></p> <p>I also fixed the print function:</p> <pre><code> void print(char var) { for ( i=poly.begin() ; i != poly.end(); i++ ) { //going through the entire list to retrieve the terms and print them if (i == poly.end()) { // if we reached the last term if (i-&gt;pow == 0) //if the last term's power is 0 we print only it's coefficient cout &lt;&lt; i-&gt;coef; else cout &lt;&lt; i-&gt;coef &lt;&lt; var &lt;&lt; "^" &lt;&lt; i-&gt;pow; //otherwise we print both } else { if (i-&gt;coef &gt; 0) //if the coef value is positive cout &lt;&lt; i-&gt;coef &lt;&lt; var &lt;&lt; "^" &lt;&lt; i-&gt;pow &lt;&lt; " + "; //we also add the '+' sign else cout &lt;&lt; i-&gt;coef &lt;&lt; var &lt;&lt; "^" &lt;&lt; i-&gt;pow &lt;&lt; " - "; // otherwise we add '-' sign } } } </code></pre>
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    1. POPolynomial Calculator
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    1. USJonH
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    1. COwell thanks for your help, but now it says that the use of unary * is illegal and also no match for operator poly.end() - 1
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      1. USVlad
    2. CO@Vlad those are additional errors, this clears up only the error about braces.
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    3. CO@vlad you called poly.end(), does that even exist ?
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