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POcin.getline() is skipping an input in C++
 

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  1. POcin.getline() is skipping an input in C++
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    <p>If I use the following code, getline doesn't take the last input(for last iteration of "for" loop, it simply skips it) -</p> <pre><code>int main() { int n; map&lt;string, set&lt;string&gt; &gt; lst; string c,s,c2; cin&gt;&gt;n; for(int i=0;i&lt;n;i++) { getline(cin,c); // here it skips the input for last iteration stringstream ss; ss&lt;&lt;c; bool f=1; while(ss&gt;&gt;s) { if(f) { c2=s; f=0; } else lst[c2].insert(s); } } for (map&lt;string, set&lt;string&gt; &gt;::const_iterator ci = lst.begin(); ci != lst.end(); ++ci) { cout&lt;&lt; (*ci).first &lt;&lt;" "&lt;&lt; (*ci).second.size() &lt;&lt;endl; } } </code></pre> <p>To get rid of it, I put cin.ignore() after getline. Now its taking all the inputs but I'm facing a new issue -</p> <pre><code>#include&lt;iostream&gt; #include&lt;string&gt; #include&lt;map&gt; #include&lt;set&gt; #include&lt;sstream&gt; #include&lt;algorithm&gt; using namespace std; int main() { int n; map&lt;string, set&lt;string&gt; &gt; lst; string c,s,c2; cin&gt;&gt;n; for(int i=0;i&lt;n;i++) { getline(cin,c); cin.ignore(); stringstream ss; ss&lt;&lt;c; bool f=1; while(ss&gt;&gt;s) { if(f) { c2=s; f=0; } else lst[c2].insert(s); } } for (map&lt;string, set&lt;string&gt; &gt;::const_iterator ci = lst.begin(); ci != lst.end(); ++ci) { cout&lt;&lt; (*ci).first &lt;&lt;" "&lt;&lt; (*ci).second.size() &lt;&lt;endl; } } </code></pre> <p>The new issue is that while taking c2, first character of string gets removed. For example, if I give "England Jane Doe" as input to getline, in c2 I'll get "ngland".</p> <p>How to get rid of this issue now?</p>
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    1. UStheharshest
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      1. POcin.getline() is skipping an input in C++
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    1. COMixing `>>` and `getline` is delicate. In any case, you never *check* the result of either, so why would you even expect your code to work?
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      1. POcin.getline() is skipping an input in C++
      1. USKerrek SB
    2. CO`(*ci).first` easier to read as `ci->first`
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      1. POcin.getline() is skipping an input in C++
      1. USMartin York
    3. COpossible duplicate of [using getline(cin, s) after cin](http://stackoverflow.com/questions/5739937/using-getlinecin-s-after-cin)
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      1. POcin.getline() is skipping an input in C++
      1. USalexisdm
 

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