How C + + lets a function return an array

This is a very elementary problem, but it may be a headache for those who don't know. A function in C + + cannot return an array directly, but an array is actually a pointer, so it can be implemented by a function that returns a pointer. such as a function of matrix multiplication, it is easy for us to write:

1 #include <iostream> 2  3 using namespace std; 4  5 void Multmatrix (float m[4], float a[4], float b[4]) 6 {7     m[0] = a[0]*b[0] + a[1]*b[2]; 8     M[1] = a[0]*b[1] + a[1]*b[3]; 9     m[2] = a[2]*b[0] + a[3]*b[2];10     m[3] = a[2]*b[1] + a[3]*b[3];11 (cout     << m[0] << "" <<  M[1] << endl;13     cout << m[2] << "<< m[3] << endl;14}15 + int main ()     A[4] = {1.75, 0.66, 0, 1.75};19     float B[4] = {1, 1, 0, 0};20     float *m = new float[4];22     Multmatrix (M, A, B);     cout << m[0] << "<< m[1] << endl;25     cout << m[2] <<" "< < m[3] << endl;26     delete[] m;27     return 0;29}

How C + + lets a function return an array