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POMultimap erase doesn't work
 

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    <p>following code doesn't work with input:</p> <pre><code>2 7 add Elly 0888424242 add Elly 0883666666 queryname Elly querynum 0883266642 querynum 0888424242 delnum 0883666666 queryname Elly 3 add Kriss 42 add Elly 42 querynum 42 </code></pre> <p>Why my erase doesn't work?</p> <pre><code>#include&lt;stdio.h&gt; #include&lt;iostream&gt; #include&lt;map&gt; #include &lt;string&gt; using namespace std; void PrintMapName(multimap&lt;string, string&gt; pN, string s) { pair&lt;multimap&lt;string,string&gt;::iterator, multimap&lt;string,string&gt;::iterator&gt; ii; multimap&lt;string, string&gt;::iterator it; ii = pN.equal_range(s); multimap&lt;string, int&gt; tmp; for(it = ii.first; it != ii.second; ++it) { tmp.insert(pair&lt;string,int&gt;(it-&gt;second,1)); } multimap&lt;string, int&gt;::iterator i; bool flag = false; for(i = tmp.begin(); i != tmp.end(); i++) { if(flag) { cout&lt;&lt;" "; } cout&lt;&lt;i-&gt;first; if(flag) { cout&lt;&lt;" "; } flag = true; } cout&lt;&lt;endl; } void PrintMapNumber(multimap&lt;string, string&gt; pN, string s) { multimap&lt;string, string&gt;::iterator it; multimap&lt;string, int&gt; tmp; for(it = pN.begin(); it != pN.end(); it++ ) { if(it-&gt;second == s) { tmp.insert(pair&lt;string,int&gt;(it-&gt;first,1)); } } multimap&lt;string, int&gt;::iterator i; bool flag = false; for(i = tmp.begin(); i != tmp.end(); i++) { if(flag) { cout&lt;&lt;" "; } cout&lt;&lt;i-&gt;first; if(flag) { cout&lt;&lt;" "; } flag = true; } cout&lt;&lt;endl; } void PrintFull(multimap&lt;string, string&gt; pN) { multimap&lt;string, string&gt;::iterator it; for(it = pN.begin(); it != pN.end(); it++ ) { cout&lt;&lt;"Key = "&lt;&lt;it-&gt;first&lt;&lt;" Value = "&lt;&lt;it-&gt;second&lt;&lt;endl; } } int main() { multimap&lt;string, string&gt; phoneNums; int N; cin&gt;&gt;N; int tests; string tmp, tmp1,tmp2; while(N &gt; 0) { cin&gt;&gt;tests; while(tests &gt; 0) { cin&gt;&gt;tmp; if(tmp == "add") { cin&gt;&gt;tmp1&gt;&gt;tmp2; phoneNums.insert(pair&lt;string,string&gt;(tmp1,tmp2)); } else { if(tmp == "delnum") { /////////////////////////////////////////HEREEEEEEE multimap&lt;string, string&gt;::iterator it; multimap&lt;string, string&gt;::iterator tmpr; for(it = phoneNums.begin(); it != phoneNums.end();) { tmpr = it; if(it-&gt;second == tmp1) { ++tmpr; if(tmpr == phoneNums.end()) { phoneNums.erase(it,tmpr); break; } else { phoneNums.erase(it,tmpr); } } } } else { if(tmp == "delname") { cin&gt;&gt;tmp1; phoneNums.erase(tmp1); } else { if(tmp =="queryname") { cin&gt;&gt;tmp1; PrintMapName(phoneNums, tmp1); } else//querynum { cin&gt;&gt;tmp1; PrintMapNumber(phoneNums, tmp1); } } } } tests--; } N--; } return 0; } </code></pre>
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