Solidity 整型类型

 

demo.sol（整型类型）：

pragma solidity ^0.4.21;


contract IntegerTest {
    
    uint8 _v1 = 10;    // 0~255
    
    constructor(uint8 para) public {
        _v1 = para;
    }
    
    function getValue() constant public returns(uint8) {
        return _v1;
    }
    
    function com1() constant public returns (bool) {
        return _v1 >= 10;
    }
    
    uint8 a = 10;
    uint8 b = 4;
    uint8 c = 3;
    
    function f1() constant public returns (bool) {
        return  a & b == 0;
    }
    
    function f2() constant public returns (bool) {
        return  a | b == 14;
    }
    
    function f3() constant public returns (bool) {
        return  a ^ b == 14;
    }
    
    function f4() constant public returns (bool) {
        return  (~c) == 252;
    }
    
}