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#include <stdio.h>
#include <stdlib.h>

#define　　MATRIX_FACT(row, col)　　　　a[(row) * rowLength + (col)]
#define　　PART_MATRIX_FACT(row, col)　　partMatrix[(row) * (rowLength - 1) + (col)]

double getDeterminant(double *a, int rowLength, int colLength);

int main(void){
　　double　　a[4][4] = {{1, 2, 3, 0}, {4, 5, 6, 0}, {7, 8, 9, 0}, {2, 4, 6, 8}};
　　//double　　a[4][4] = {{1, 0, 0, 0}, {0, 1, 0, 0}, {0, 0, 1, 0}, {0, 0, 0, 1}};
　　int　　　　rowLength = 4;
　　int　　　　colLength = 4;
　　//double　　a[3][3] = {{0, -2, 0}, {-1, 3, 1}, {4, 2, 1}};
　　//int　　　　rowLength = 3;
　　//int　　　　colLength = 3;
　　double　　determinant = (double)0;
　　determinant = getDeterminant((double *)a, rowLength, colLength);
　　printf("determinant=%f\n", determinant);
　　return 0;
}

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