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POArrays vs. Structs C++
 

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    <p>I don't seem to understand why I'm getting a:</p> <pre><code>Segmentation fault (core dumped) </code></pre> <p>When inputting my 'movies' into the movie struct. Are there any blaring obvious logic errors here or what?</p> <p>Along with the segmentation fault my for loop within the void set_movies() seems to only be returning 4 prompts for movies when it should be returning 5 due to the #define NUM_MOVIES 5.</p> <p>Thanks a ton!</p> <pre><code>#include &lt;iostream&gt; #include &lt;string&gt; #include &lt;sstream&gt; #define NUM_MOVIES 5 using namespace std; struct movie{ string name[]; double copies[]; double rating[]; string description[]; string genre[]; } films [NUM_MOVIES]; void set_movies(); int which_movies_to_view(); int get_movies(); int rent_movie(); int printmovie(); int choice; int main(){ set_movies(); which_movies_to_view(); get_movies(); rent_movie(); return 0; } void set_movies(){ movie set; for(int i=0; i&lt;NUM_MOVIES; i++){ cout &lt;&lt; "Enter movie title: " &lt;&lt; endl; cin &gt;&gt; set.name[i]; cout &lt;&lt; "Enter how many copies: " &lt;&lt; endl; cin &gt;&gt; set.copies[i]; cout &lt;&lt; "Enter the rating: " &lt;&lt; endl; cin &gt;&gt; set.rating[i]; cout &lt;&lt; "Enter a description: " &lt;&lt; endl; cin &gt;&gt; set.description[i]; cout &lt;&lt; "Enter the genre: " &lt;&lt; endl; cin &gt;&gt; set.genre[i]; } } int which_movies_to_view(){ movie set; cout &lt;&lt; " " &lt;&lt; set.name[1] &lt;&lt; set.name[2] &lt;&lt; set.name[3] &lt;&lt; set.name[4] &lt;&lt; set.name[5] &lt;&lt; endl; cout &lt;&lt; "Which movie would you like to view?: [1, 2, 3, 4, or 5]" &lt;&lt; endl; cin &gt;&gt; choice; return choice; } int get_movies(){ movie set; if(choice == 1){ cout &lt;&lt; set.name[1] &lt;&lt; endl; } if(choice == 2){ cout &lt;&lt; set.name[2] &lt;&lt; endl; } if(choice == 3){ cout &lt;&lt; set.name[3] &lt;&lt; endl; } if(choice == 4){ cout &lt;&lt; set.name[4] &lt;&lt; endl; } if(choice == 5){ cout &lt;&lt; set.name[5] &lt;&lt; endl; } return 0; } int printmovie(){ int n; for(int n = 0; n&lt;NUM_MOVIES; n++) cout &lt;&lt; films[n].name; cout &lt;&lt; films[n].copies; cout &lt;&lt; films[n].rating; cout &lt;&lt; films[n].description; cout &lt;&lt; films[n].genre; return 0; } int rent_movie(){ movie set; if(choice == 1){ set.copies[0] - 1; cout &lt;&lt; set.copies[0] &lt;&lt; " copies left!" &lt;&lt; endl; } if(choice == 2){ set.copies[1] - 1; cout &lt;&lt; set.copies[1] &lt;&lt; " copies left!" &lt;&lt; endl; } if(choice == 3){ set.copies[2] - 1; cout &lt;&lt; set.copies[2] &lt;&lt; " copies left!" &lt;&lt; endl; } if(choice == 4){ set.copies[3] - 1; cout &lt;&lt; set.copies[3] &lt;&lt; " copies left!" &lt;&lt; endl; } if(choice == 5){ set.copies[4] - 1; cout &lt;&lt; set.copies[4] &lt;&lt; " copies left!" &lt;&lt; endl; } return 0; } </code></pre>
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    1. COYou're writing to uninitialized memory – classic [undefined behavior](http://en.wikipedia.org/wiki/Undefined_behavior).
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