1 | package main |
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2 | import "fmt" |
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3 | |
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4 | // const R int = 0; |
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5 | // const G uint = 1; |
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6 | // const B = 2; |
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7 | // const Fred = "Fred"; |
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8 | // const Mary = "Mary"; |
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9 | // const Jane = "Jane"; |
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10 | // const S = 0; |
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11 | // const T = 0; |
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12 | // const USA = "USA"; |
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13 | // const U = "USA"; |
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14 | // const V = 3.1; |
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15 | // const W = 3.1; |
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16 | // |
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17 | // func main() { |
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18 | // fmt.Println( Mon, Tue, Wed ) |
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19 | // } // main |
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20 | |
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21 | |
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22 | const ( R = 0; G = 3; B ) // implicit: 0 0 0 |
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23 | const ( Fred = "Fred"; Mary = "Mary"; Jane = "Jane" ) // Fred Mary Jane |
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24 | const ( H = 0; Jack = "Jack"; J; K = 0; I ) // type change, implicit: 0 Jack Jack |
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25 | const ( C = iota + G; M = iota; Y ) |
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26 | const ( Mon = iota; Tue; Wed; // 0, 1, 2 |
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27 | Thu = 10; Fri = iota - Wed + Thu - 1; Sat; Sun = iota ) // 10, 11, 12, 13 |
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28 | const ( O1 = iota + 1; _; O3; _; O5 ) // 1, 3, 5 |
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29 | const ( V1 = iota; V2; V3 = 7; V4 = iota + 1; V5 ) |
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30 | const ( S = 0; T; USA = "USA"; U; V = 3.1; W ) |
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31 | const ( D = 1.5; E ); |
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32 | |
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33 | |
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34 | |
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35 | func main() { |
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36 | if 3 == R {}; |
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37 | fmt.Println( R, G, B ) |
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38 | fmt.Println( Fred, Mary, Jane ) |
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39 | fmt.Println( H, Jack, J, K, I ) |
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40 | fmt.Println( C, M, Y ) |
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41 | fmt.Println( Mon, Tue, Wed, Thu, Fri, Sat, Sun ) |
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42 | fmt.Println( O1, O3, O5 ) |
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43 | fmt.Println( V1, V2, V3, V4, V5 ) |
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44 | fmt.Println( S, T, USA, U, V, W ) |
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45 | |
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46 | day := Mon; |
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47 | switch day { |
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48 | case Mon, Tue, Wed, Thu, Fri: |
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49 | fmt.Println( "weekday" ); |
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50 | case Sat, Sun: |
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51 | fmt.Println( "weekend" ); |
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52 | } |
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53 | for i := Mon; i <= Sun; i += 1 { |
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54 | fmt.Println( i ) |
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55 | } |
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56 | |
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57 | var ar[Sun] int |
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58 | ar[Mon] = 3 |
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59 | } // main |
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