9、Solidity的时间、单位转换。

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以下这些以太币单位都是solidity中可以使用的关键词。

• ether
• finney
• szabo
• wei

Ether的Demo合约

pragma solidity 0.4.10;
contract demo {
    uint public balance;
    function demo() {
        balance = 1 ether;
    }

    function addFinney() {
        balance += 1 finney;
    }

    function addSzabo() {
        balance += 1 szabo;
    }

    function addWei() {
        balance += 1 wei;
    }
}

Time

有以下几种Time类型

• seconds
• minutes
• hours
• days
• weeks
• years
• now

Time的Demo合约

pragma solidity 0.4.10;
contract demo {
    uint public a;
    function demo() {
        // a = now;
        a = 10000000000;
    }

    function addSeconds(uint num) {
        a += num;
    }

    function addMinutes(uint num) {
        a += num * 1 minutes;
    }

    function addHours(uint num) {
        a += num * 1 hours;
    }

    function addDays(uint num) {
        a += num * 1 days;
    }

    function addWeeks(uint num) {
        a += num * 1 weeks;
    }

    function addYears(uint num) {
        a += num * 1 years;
    }
}

转载于:https://my.oschina.net/kunBlog/blog/1528526