代码
void ss2tf(double *a, double *b, double *c, double *d, int n, double *num, double *den)
{
poly(a, n, den);
double *temp_a = malloc(sizeof(double) * n * n);
trmul(b, c, n, 1, n, temp_a);
for (size_t i = 0; i < n; i++)
{
for (size_t j = 0; j < n; j++)
{
temp_a[i * n + j] = a[i * n + j] - temp_a[i * n + j];
}
}
poly(temp_a, n, num);

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