有byte bytes1 bytes2 … bytes32
特殊的有byte == bytes1
后面的数字代表占了多少字节。1个字节在内存中占了8位
固定字节数组不能修改长度和内容
16进制中的1个数字代表占了4位。
1234567 | bytes1 public num1 = 0x6a; //转换为10进制:106bytes2 public num2 = 0x6a6f; //转换为10进制:27247bytes6 public num3 = 0x6a6f6e736f6e; bytes1 public a = 0x6a;//转换为2进制:0110 1010 bytes1 public b = 0x6f;//转换为2进制:0110 1111 |
123 | function getlength() view public returns(uint,uint,uint){ return (num1.length,num2.length,num3.length);} |
不同类型的字节也可以比较大小
1234567891011121314151617181920212223242526 | function test1() public view returns(bool){ return a>b;} function test2() public view returns(bool){ return a>=b;} function test3() public view returns(bool){ return a<b;} function test4() public view returns(bool){ return a<=b;}function test5() public view returns(bool){ return a==b;} function test6() public view returns(bool){ return a!=b;} function test7() public view returns(bool){ return num2 >num1;} |
12345678910111213141516171819202122232425262728 | // 0110 1010// 0110 1111//&0110 1010 106 0x6a//|0110 1111 111 0x6f//^0000 0101 5 0x05//~1001 0101 149 0x95//<1101 0100 212 0xd4//>0011 0101 53 0x35 function weiTest1() public view returns(bytes1){ return a & b;} function weiTest2() public view returns(bytes1){ return a | b;} function weiTest3() public view returns(bytes1){ return a ^ b;} function weiTest4() public view returns(bytes1){ return ~a;} function weiTest5() public view returns(bytes1){ return a<<1; } function weiTest6() public view returns(bytes1){ return a >>1;} |
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081 | pragma solidity ^0.4.23;contract bytesTest{ //0x6a6f6e736f6e bytes1 public num1 = 0x6a; //106 bytes2 public num2 = 0x6a6f; //27247 bytes6 public num3 = 0x6a6f6e736f6e; bytes1 public a = 0x6a;//0110 1010 106 bytes1 public b = 0x6f;//0110 1111 111 function getlength() view public returns(uint,uint,uint){ return (num1.length,num2.length,num3.length); } // function changeLength() public { // num1.length = 9; // } function test1() public view returns(bool){ return a>b; } function test2() public view returns(bool){ return a>=b; } function test3() public view returns(bool){ return a<b; } function test4() public view returns(bool){ return a<=b; } function test5() public view returns(bool){ return a==b; } function test6() public view returns(bool){ return a!=b; } function test7() public view returns(bool){ return num2 >num1; } // 0110 1010 // 0110 1111 //&0110 1010 106 0x6a //|0110 1111 111 0x6f //^0000 0101 5 0x05 //~1001 0101 149 0x95 //<1101 0100 212 0xd4 //>0011 0101 53 0x35 function weiTest1() public view returns(bytes1){ return a & b; } function weiTest2() public view returns(bytes1){ return a | b; } function weiTest3() public view returns(bytes1){ return a ^ b; } function weiTest4() public view returns(bytes1){ return ~a; } function weiTest5() public view returns(bytes1){ return a<<1; } function weiTest6() public view returns(bytes1){ return a >>1; }} |
本文链接: https://dreamerjonson.com/2018/11/14/solidity-9/
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