我在实心课程上过得很艰难

Question

我是stackowerflow的新手，也是可靠的新手。

我必须这样做:在函数booleanOperatorTest中，对变量foo求反，并将结果赋给变量negation

pragma solidity ^0.4.17;

contract OperatorTutorial {

    function booleanOperatorTest(bool foo, bool bar) public pure
        returns (bool negation, bool conjunction, bool disjunction, bool equality, bool inequality) {

        // Negate the variable "foo" and assign the result to variable "negation"
        // negation =
}

我试了所有的方法，但我不能通过这一步，请帮助，谢谢。

Answer 1

示例函数：

function booleanOperatorTest(bool foo, bool bar) public pure
    returns (bool negation,bool conjunction) {

    // Negate the variable "foo" and assign the result to variable "negation"
      negation =foo;
      conjunction  = (foo && bar);
      ...

}

Answer 2

pragma solidity ^0.4.17;

contract OperatorTutorial {

    function booleanOperatorTest(bool foo, bool bar) public pure
        returns (bool negation, bool conjunction, bool disjunction, bool equality, bool inequality) {
        negation = !foo;
 }

感谢Mert Sungur

Answer 3

pragma solidity ^0.4.17;

contract OperatorTutorial {

    function booleanOperatorTest(bool foo, bool bar) public pure
        returns (bool negation, bool conjunction, bool disjunction, bool equality, bool inequality) {

        // Negate the variable "foo" and assign the result to variable "negation"
        // negation =
           negation = !foo;
        // Use logical "and" on variables "foo" and "bar" and assign the result to variable "conjunction"
        // conjunction =
           conjunction  = (foo && bar);
        // Use logical "or" on variables "foo" and "bar" and assign the result to variable "disjunction"
        // disjunction =
           disjunction = (foo || bar);
        // Make sure variable "equality" is true when "foo" and "bar" are equal and is false otherwise.
        // equality =
           equality = (foo  == bar);
        // Make sure variable "inequality" is true when "foo" and "bar" are not equal and is false otherwise.
        // inequality =
           inequality = (foo != bar);
    }