how many steps are suggested to follow when we preview an article?( )

在预览一篇文章时，建议按照以下步骤进行操作：

1. 阅读标题和导语：开始时，先仔细阅读文章的标题和导语，这能够帮助我们快速了解文章的主题和内容概要。

2. 粗读正文：我们可以先快速浏览文章的主体部分，目的是获取整体的框架和大致内容。这时候不需要深入阅读细节，而是着重抓住段落的第一句话或主题句。

3. 注意标题和副标题：标题和副标题通常会提供文章的核心信息和结构，因此我们应该特别关注它们，并留意一些关键词和关键短语。

4. 大意归纳：在快速粗读之后，我们需要动脑筋将整篇文章的主旨和要点概括出来。可以思考一下文章所回答的问题或提供的信息，并用自己的话简洁地总结。

5. 细读细节：在了解了整篇文章的大致内容之后，我们可以再次回到文章细节，逐段细读、理解和分析。这时候可以关注一些重要的细节、关联词语和作者的观点。

6. 批判性思考：在阅读文章时，我们还应该保持批判性思维，思考作者的观点是否合理、有无漏洞，并与我们已有的知识和经验进行连接。

综上所述，预览一篇文章的步骤包括阅读标题和导语、粗读正文、注意标题和副标题、大意归纳、细读细节和批判性思考。通过这些步骤，我们能够快速了解文章的内容和结构，并深入理解作者的观点和意图。

相关问题

Missing parentheses in call to 'print'. Did you mean print(first_2000)?

As an AI language model, I cannot determine the context in which this error occurred. However, based on the error message provided, it seems like there is an issue with the syntax of the print statement, and a missing closing parenthesis is causing the error. The suggested solution is to add a closing parenthesis to the print statement. For example, if the code is supposed to print the variable `first_2000`, the correct syntax would be `print(first_2000)`.

I mean I'm quite new to system verilog, so I need you to show me the concrete code after modification, can you show me the code of the 10 ways of modification you just suggested? thanks a lot

Certainly! Here's the code for the 10 modifications I suggested:

1. Modify the values in both `t1` and `t2` class constructors to be random numbers instead of hard-coded values.

interface Int();
   class t1;
      integer a[string];
      function new;
         a["a"] =$random;
         a["b"] =$random;
         a["c"] =$random;
      endfunction
   endclass
   class t2;
      integer b[string];
      function new;
         b["aa"] =$random;
         b["bb"] =$random;
         b["cc"] =$random;
      endfunction
   endclass
   t1 inst1 =new;
   t2 inst2 =new;
endinterface

2. Add an additional class that extends `t1` and `t2` and overrides specific values with its own.

interface Int();
   class t1;
      integer a[string];
      function new;
         a["a"] =40;
         a["b"] =60;
         a["c"] =80;
      endfunction
   endclass
   class t2;
      integer b[string];
      function new;
         b["aa"] =44;
         b["bb"] =66;
         b["cc"] =88;
      endfunction
   endclass
   class t3 extends t1,t2;
      function new;
         super.new();
         a["a"] =100;
         b["bb"] =200;
      endfunction
   endclass
   t1 inst1 =new;
   t2 inst2 =new;
   t3 inst3 =new;
endinterface

3. Use a different data type for the `integer array[string]` variable, such as `real array[string]`.

interface Int();
   class t1;
      real a[string];
      function new;
         a["a"] =40;
         a["b"] =60;
         a["c"] =80;
      endfunction
   endclass
   class t2;
      real b[string];
      function new;
         b["aa"] =44;
         b["bb"] =66;
         b["cc"] =88;
      endfunction
   endclass
   t1 inst1 =new;
   t2 inst2 =new;
endinterface

4. Change the `virtual` keyword to `pure virtual` in the `Int` interface declaration.

interface Int();
   pure virtual class t1;
      integer a[string];
      function new;
         a["a"] =40;
         a["b"] =60;
         a["c"] =80;
      endfunction
   endclass
   pure virtual class t2;
      integer b[string];
      function new;
         b["aa"] =44;
         b["bb"] =66;
         b["cc"] =88;
      endfunction
   endclass
   t1 inst1 =new;
   t2 inst2 =new;
endinterface

5. Replace the `initial` block with a `task` or `function` that takes in the `Int` interface as an argument and returns the `array` variable.

interface Int();
   class t1;
      integer a[string];
      function new;
         a["a"] =40;
         a["b"] =60;
         a["c"] =80;
      endfunction
   endclass
   class t2;
      integer b[string];
      function new;
         b["aa"] =44;
         b["bb"] =66;
         b["cc"] =88;
      endfunction
   endclass
   task test;
      input Int in;
      integer array[string];
      begin
         #1;
         array =in.inst1.a;
         $display("testint.inst1.a =%p", in.inst1.a);
         $display("array = %p", array);
         #2;
         array =in.inst2.b;
         $display("testint.inst2.b =%p", in.inst2.b);
         $display("array =%p", array);
      end
   endtask
   t1 inst1 =new;
   t2 inst2 =new;
endinterface
module top;
   Int in();
   initial begin
      test(in);
   end
endmodule

6. Add a `bit [31:0]` variable to both `t1` and `t2` classes and modify the constructor functions to set it to the sum of the other values.

interface Int();
   class t1;
      integer a[string];
      bit [31:0] sum;
      function new;
         a["a"] =40;
         a["b"] =60;
         a["c"] =80;
         sum =a["a"] +a["b"] +a["c"];
      endfunction
   endclass
   class t2;
      integer b[string];
      bit [31:0] sum;
      function new;
         b["aa"] =44;
         b["bb"] =66;
         b["cc"] =88;
         sum =b["aa"] +b["bb"] +b["cc"];
      endfunction
   endclass
   t1 inst1 =new;
   t2 inst2 =new;
endinterface

7. Create a new interface that extends `Int` and adds additional methods or variables.

interface Int();
   class t1;
      integer a[string];
      function new;
         a["a"] =40;
         a["b"] =60;
         a["c"] =80;
      endfunction
   endclass
   class t2;
      integer b[string];
      function new;
         b["aa"] =44;
         b["bb"] =66;
         b["cc"] =88;
      endfunction
   endclass
   t1 inst1 =new;
   t2 inst2 =new;
endinterface

interface Int2 extends Int();
   parameter int MAX_ARRAY_SIZE =100;
   function void print_array();
      for (int i =0; i < MAX_ARRAY_SIZE; i++) begin
         $display("a[%0d] = %0d", i, inst1.a[i]);
      end
   endfunction
endinterface

module top;
   Int2 in();
   initial begin
      in.print_array();
   end
endmodule

8. Modify the `testint` variable to be a `typedef` of the `Int` interface instead of a `virtual` instance.

typedef Int testint_t;
testint_t in =new();

9. Change the `integer` data type to `bit [7:0]` for all instances of `integer` in the code.

interface Int();
   class t1;
      bit [7:0] a[string];
      function new;
         a["a"] =40;
         a["b"] =60;
         a["c"] =80;
      endfunction
   endclass
   class t2;
      bit [7:0] b[string];
      function new;
         b["aa"] =44;
         b["bb"] =66;
         b["cc"] =88;
      endfunction
   endclass
   t1 inst1 =new;
   t2 inst2 =new;
endinterface

10. Add assertions to the code to ensure that the values in `testint.inst1.a` and `testint.inst2.b` are always greater than zero.

interface Int();
   class t1;
      integer a[string];
      function new;
         a["a"] =40;
         a["b"] =60;
         a["c"] =80;
         assert(a["a"] > 0) else $error("Value of a[a] is not greater than zero");
         assert(a["b"] > 0) else $error("Value of a[b] is not greater than zero");
         assert(a["c"] > 0) else $error("Value of a[c] is not greater than zero");
      endfunction
   endclass
   class t2;
      integer b[string];
      function new;
         b["aa"] =44;
         b["bb"] =66;
         b["cc"] =88;
         assert(b["aa"] > 0) else $error("Value of b[aa] is not greater than zero");
         assert(b["bb"] > 0) else $error("Value of b[bb] is not greater than zero");
         assert(b["cc"] > 0) else $error("Value of b[cc] is not greater than zero");
      endfunction
   endclass
   t1 inst1 =new;
   t2 inst2 =new;
endinterface