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POFind the biggest 3 numbers in a vector
 

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    <p>I'm trying to make a function to get the 3 biggest numbers in a vector. For example: Numbers: 1 6 2 5 3 7 4 Result: 5 6 7</p> <p>I figured I could sort them DESC, get the 3 numbers at the beggining, and after that resort them ASC, but that would be a waste of memory allocation and execution time. I know there is a simpler solution, but I can't figure it out. And another problem is, what if I have only two numbers...</p> <p>BTW: I use as compiler BorlandC++ 3.1 (I know, very old, but that's what I'll use at the exam..)</p> <p>Thanks guys.</p> <p>LE: If anyone wants to know more about what I'm trying to accomplish, you can check the code:</p> <pre><code>#include&lt;fstream.h&gt; #include&lt;conio.h&gt; int v[1000], n; ifstream f("bac.in"); void citire(); void afisare_a(); int ultima_cifra(int nr); void sortare(int asc); void main() { clrscr(); citire(); sortare(2); afisare_a(); getch(); } void citire() { f&gt;&gt;n; for(int i = 0; i &lt; n; i++) f&gt;&gt;v[i]; f.close(); } void afisare_a() { for(int i = 0;i &lt; n; i++) if(ultima_cifra(v[i]) == 5) cout&lt;&lt;v[i]&lt;&lt;" "; } int ultima_cifra(int nr) { return nr - 10 * ( nr / 10 ); } void sortare(int asc) { int aux, s; if(asc == 1) do { s = 0; for(int i = 0; i &lt; n-1; i++) if(v[i] &gt; v[i+1]) { aux = v[i]; v[i] = v[i+1]; v[i+1] = aux; s = 1; } } while( s == 1); else do { s = 0; for(int i = 0; i &lt; n-1; i++) if(v[i] &lt; v[i+1]) { aux = v[i]; v[i] = v[i+1]; v[i+1] = v[i]; s = 1; } } while(s == 1); } </code></pre> <p>Citire = Read Afisare = Display Ultima Cifra = Last digit of number Sortare = Bubble Sort</p>
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    1. COWhy is this tagged bubble-sort?
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    2. COOut of curiosity, what kind of exam is that? Even at University, we had access to current compilers. And learning (passing exams) in such ancient technologies doesn’t sound very useful. ;-)
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    3. COI'm really curious why you are doing two sorts?
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