row major을 col major로 바꾸기

#include <string.h>

void change_major(float* A, int M, int N) {
	float* tmpA = (float*)malloc(sizeof(float) * (M * N));
	memcpy(tmpA, A, sizeof(float) * M * N);

	for (int n = 0; n < N; n++) {
		for (int m = 0; m < M; m++) {
			A[n * M + m] = tmpA[m * N + n];
		}
	}

	free(tmpA);
}