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  1. #include <iostream>
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4.  
  5. using namespace std;
  6.  
  7. //////////////////// 주석 뗀 버전
  8.  
  9. int* buildSnailReverse(int* a, int w, int h)
  10. {
  11.         int
  12.         u[] = { 1, w,-1,-w},
  13.         d = w < h,
  14.         z = ((d? w: h) - 1 >> 1) * (w + 1) + (~w & d),
  15.         n = d? h - w: w - h,
  16.         p = 0,
  17.         c = n,
  18.         i = 0;
  19.         while(i < w * h)
  20.         {
  21.                 a[z] = ++i;
  22.                 z += u[d];
  23.                 if (!c--) ++d &= 3, c = n ^= p ^= n ^= p++;
  24.         }
  25.         return a;
  26. }
  27.  
  28. void printArray(int* a, int w, int h) { for(int y = 0; y < h; y++) { for(int x = 0; x < w; x++) printf("%3d", a[x + y * w]); cout << endl; } }
  29.  
  30. int main()
  31. {
  32.         int w, h;
  33.         cin >> w >> h;
  34.         int* a = new int[w * h];
  35.         buildSnailReverse(a, w, h);
  36.         printArray(a, w, h);
  37.         delete[] a;
  38.         fflush(stdin);
  39.         getchar();
  40.         return 0;
  41. }
Runtime error #stdin #stdout 0s 3876KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/EHUI7p
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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