如何转换一维数组被列为主，以2D [英] How to convert 1D array to 2D by column major

问题描述

说我有一维数组如 INT [] X = {1,2,3,4,5,6,7,8,9,10,11,12,13,14， 15,16} 。结果
我想这CONVER到2D它看起来像：

say I have a 1D array like int[] x = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}.
I would like to conver it into 2D where it looks like:

1 5  9 13  
2 6 10 14  
3 7 11 15  
4 8 12 16  

目前，我有

for (int i = 0; i < 4; i++)
{
    for (int j = 0; j < Nb; j++)
        s[i][j] = x[i + j];
}

不过，这并不工作。我会怎么做呢？

However, that doesnt work. How would I do this?

推荐答案

尝试

for (int i = 0, k=0; i < 4; i++)
  for (int j = 0; j < Nb; j++)
    s[j][i] = x[k++]; // you may want s[i][j]

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