[leetcode]-867. Transpose Matrix（C语言）

Given a matrix A, return the transpose of A.

The transpose of a matrix is the matrix flipped over it's main diagonal, switching the row and column indices of the matrix.

Example 1:

Input: [[1,2,3],[4,5,6],[7,8,9]]
Output: [[1,4,7],[2,5,8],[3,6,9]]

Example 2:

Input: [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]

Note:

1. 1 <= A.length <= 1000
2. 1 <= A[0].length <= 1000

/**
 * Return an array of arrays of size *returnSize.
 * The sizes of the arrays are returned as *columnSizes array.
 * Note: Both returned array and *columnSizes array must be malloced, assume caller calls free().
 */
int** transpose(int** A, int ARowSize, int *AColSizes, int** columnSizes, int* returnSize) {
    int i,j,k=0;
    *returnSize=*AColSizes;
    int **res=(int **)malloc(sizeof(int *)*(*AColSizes));
    *columnSizes=(int *)malloc(sizeof(int)*(*AColSizes));
    for(i=0;i<*AColSizes;i++)
    {
        columnSizes[0][i]=ARowSize;
    }
    for(k=0;k<*AColSizes;k++)
    {
        res[k]=(int *)malloc(sizeof(int)*ARowSize);
        for(i=0;i<ARowSize;i++)
        {
            res[k][i]=A[i][k];
        }
    }
    return res;
}