typedef struct {
  char a;
  struct {
    int b[4][5];
  };
  double c;
} Temp;

void init(int row, int col, int arr[4][5]) {
    for (int i = 0; i < row; i++) {
        for (int j = 0; j < col; j++) {
            arr[i][j] = i * j;
        }
    }
}

int main() {
    Temp temp;
    int row = 4, col = 5;
    init(row, col, temp.b);

    Temp temp2;
    temp2 = temp;
    
    return temp2.b[2][3] == 6;
}