Solidity中uint转string
在《Solidity中uint转bytes》中,我们知道unit如何转换成bytes,其实把uint转换成string,就是在最后加上string(bytes变量)即可,如下所示:
pragma solidity ^0.4.2; contract Test { function toBytesNickJohnson(uint256 x) constant returns (bytes b) { b = new bytes(32); assembly { mstore(add(b, 32), x) } } function getStr(uint playChoice) returns (string s) { bytes memory c = toBytesNickJohnson(playChoice); return string(c); } function toBytesEth(uint256 x) constant returns (bytes b) { b = new bytes(32); for (uint i = 0; i < 32; i++) { b[i] = byte(uint8(x / (2**(8*(31 - i))))); } } function toBytesNicolasMassart(uint256 x) constant returns (bytes c) { bytes32 b = bytes32(x); c = new bytes(32); for (uint i=0; i < 32; i++) { c[i] = b[i]; } } }
但是呢,我在这里再附加一种Solidity中uint转string方法,如下所示:
pragma solidity ^0.4.2; contract Test { function uint2str(uint i) internal returns (string c) { if (i == 0) return "0"; uint j = i; uint length; while (j != 0){ length++; j /= 10; } bytes memory bstr = new bytes(length); uint k = length - 1; while (i != 0){ bstr[k--] = byte(48 + i % 10); i /= 10; } c = string(bstr); } }
posted on 2018-12-21 00:26 bijian1013 阅读(2222) 评论(0) 编辑 收藏 举报