Failed to resolve: com.android.support:design:26.+

这是一个错误提示，它表示在构建你的 Android 应用程序时，Gradle 无法解析 design 库的依赖关系。有几种方法可以解决这个问题：

1. 确保你的 build.gradle 文件中添加了以下依赖关系：

dependencies {
    implementation 'com.android.support:design:26.+'
}

2. 尝试更新你的 Android SDK 和支持库版本，确保它们是最新的。

3. 如果你正在使用 Android Studio，可以尝试清除 Gradle 缓存并重新构建项目。你可以在 Android Studio 的菜单栏中选择 "File" -> "Invalidate Caches / Restart"，然后选择 "Invalidate and Restart"。

希望这些解决方案能帮助你解决这个问题。

相关问题

module DW01_add_tb; // Declare inputs and outputs reg clk; reg [3:0] A; reg [3:0] B; reg CI; wire [3:0] SUM; wire CO; // Instantiate design under test DW01_add dut( .A(A), .B(B), .CI(CI), .SUM(SUM), .CO(CO) ); // Initialize inputs initial begin A = 4'b0000; B = 4'b0000; CI = 0; clk=0; end // Adder test case task test_adder; // Test case 1: 0 + 0 with carry-in of 0 A = 4'b0000; B = 4'b0000; CI = 0; //#10; //if (SUM !== 4'b0000 || CO !== 1'b0) $display("Test failed! 0 + 0 should be 0 with carry-out of 0"); // Test case 2: 7 + 3 with carry-in of 0 A = 4'b0111; B = 4'b0011; CI = 0; //#10; //if (SUM !== 4'b1010 || CO !== 1'b0) $display("Test failed! 7 + 3 should be 10 with carry-out of 0"); // Test case 3: 5 + 11 with carry-in of 1 A = 4'b0101; B = 4'b1011; CI = 1; //#10; //if (SUM !== 4'b0001 || CO !== 1'b1) $display("Test failed! 5 + 11 should be 16 with carry-out of 1"); // Test case 4: 15+15 with carry-in of 1 A = 4'b1111; B = 4'b1111; CI = 1; //#10; //if (SUM !== 4'b1110 || CO !== 1'b1) $display("Overflow!!!"); endtask // Run test cases initial begin test_adder(); $finish; end endmodule // DW01_add_tb this verilog testbench, when compiled by verilator, it reports Verilog $Finish %Warning: vlt/t_xepic_XW01_add: Missing All Finished vlt/t_xepic_XW01_add: %Error:Missing All Finished vlt/t_xepic_XW01_add: FAILED:Missing All Finished it seems there is 1 error in this testbench, so how should I modify this testbench so that it can be compiled by verilator?

To resolve the error reported by Verilator, you need to add a final `end` statement at the end of the testbench after `$finish`. This statement will signal to Verilator that all simulation processes have completed successfully.

Additionally, you need to change the comparison operator in each of the `if` statements from `!==` to `!=`, as Verilator does not support the `!==` operator.

Here's the modified code:

module DW01_add_tb;

// Declare inputs and outputs
reg clk;
reg [3:0] A;
reg [3:0] B;
reg CI;
wire [3:0] SUM;
wire CO;

// Instantiate design under test
DW01_add dut(
  .A(A),
  .B(B),
  .CI(CI),
  .SUM(SUM),
  .CO(CO)
);

// Initialize inputs
initial begin
  A = 4'b0000;
  B = 4'b0000;
  CI = 0;
  clk=0;
end

// Adder test case
task test_adder;
  // Test case 1: 0 + 0 with carry-in of 0
  A = 4'b0000;
  B = 4'b0000;
  CI = 0;
  //#10;
  if (SUM != 4'b0000 || CO != 1'b0)
    $display("Test failed! 0 + 0 should be 0 with carry-out of 0");

  // Test case 2: 7 + 3 with carry-in of 0
  A = 4'b0111;
  B = 4'b0011;
  CI = 0;
  //#10;
  if (SUM != 4'b1010 || CO != 1'b0)
    $display("Test failed! 7 + 3 should be 10 with carry-out of 0");

  // Test case 3: 5 + 11 with carry-in of 1
  A = 4'b0101;
  B = 4'b1011;
  CI = 1;
  //#10;
  if (SUM != 4'b0001 || CO != 1'b1)
    $display("Test failed! 5 + 11 should be 16 with carry-out of 1");

  // Test case 4: 15+15 with carry-in of 1
  A = 4'b1111;
  B = 4'b1111;
  CI = 1;
  //#10;
  if (SUM != 4'b1110 || CO != 1'b1)
    $display("Overflow!!!");

endtask

// Run test cases
initial begin
  test_adder();
  $finish;
end

end // add final end statement