区块链学堂（26）：Ether Units& Time Units

港控/mmm° 2022-06-02 05:37 263阅读 0赞

### Ether ###

> Ether Units A literal number can take a suffix of wei, finney, szabo or ether to convert between the subdenominations of Ether, where Ether currency numbers without a postfix are assumed to be Wei, e.g. 2 ether == 2000 finney evaluates to true. 引用自[here][]

以下这些单位都是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;
        }
    }

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原文：http://www.ethchinese.com/?p=1113

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[here]: https://solidity.readthedocs.io/en/develop/units-and-global-variables.html#ether-units
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[ethchinese.jpg]: http://www.ethchinese.com/wp-content/uploads/2017/02/ethchinese.jpg