{"id":44044,"date":"2023-04-19T15:28:35","date_gmt":"2023-01-05T13:27:15","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/golang%e7%9a%84%e7%b1%bb%e5%9e%8b%e5%ae%9a%e4%b9%89\/"},"modified":"2024-04-30T00:14:49","modified_gmt":"2024-04-29T16:14:49","slug":"golang%e7%9a%84%e7%b1%bb%e5%9e%8b%e5%ae%9a%e4%b9%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/golang%e7%9a%84%e7%b1%bb%e5%9e%8b%e5%ae%9a%e4%b9%89\/","title":{"rendered":"Golang\u7684\u7c7b\u578b\u5b9a\u4e49"},"content":{"rendered":"

\u6570\u5b57\u7c7b\u578b<\/p>\n

func<\/span> main<\/span>(){<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"1 + 1 =\"<\/span>,<\/span> 1<\/span>+<\/span>1<\/span>)<\/span>\/\/2<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"10 - 1 =\"<\/span>,<\/span> 10<\/span>-<\/span>1<\/span>)<\/span>\/\/9<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"10 \/ 3 =\"<\/span>,<\/span> 10<\/span>\/<\/span>3<\/span>)<\/span>\/\/3<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"10.0 \/ 3 =\"<\/span>,<\/span> 10.0<\/span>\/<\/span>3<\/span>)<\/span>\/\/3.3333333333333335<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"10 % 3 =\"<\/span>,<\/span> 1<\/span>+<\/span>1<\/span>)<\/span>\/\/2<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b57\u4e32\u7c7b\u578b<\/p>\n
func<\/span> main<\/span>(){<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"Hello World\"<\/span>)<\/span>\/\/Hello World<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"Hello\"<\/span> +<\/span> \"World\"<\/span>)<\/span>\/\/Hello World<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>string<\/span>(<\/span>\"Hello World\"<\/span>[<\/span>3<\/span>]))<\/span>\/\/l<\/span>\r\n\r\n    var<\/span> s<\/span> string<\/span> =<\/span> \"Hello World\"<\/span>\r\n    s<\/span> =<\/span> strings<\/span>.<\/span>Replace<\/span>(<\/span>s<\/span>,<\/span> \"H\"<\/span>,<\/span> \"X\"<\/span>,<\/span> 2<\/span>)<\/span>\/\/\u6587\u5b57\u5217s\u306b\u3042\u308b1\u756a\u76ee\u30682\u756a\u76ee\u306eH\u3092X\u306b\u5909\u63db<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>s<\/span>)<\/span>\/\/Xello World<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>strings<\/span>.<\/span>Contains<\/span>(<\/span>s<\/span>,<\/span> \"World\"<\/span>))<\/span>\/\/true s\u306bWorld\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u5224\u5b9a<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u7c7b\u578b\u8f6c\u6362<\/p>\n
func<\/span> main<\/span>(){<\/span>\r\n    var<\/span> x<\/span> int<\/span> =<\/span> 1<\/span>\r\n    xx<\/span> :=<\/span> float64<\/span>(<\/span>x<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"%T %v<\/span>\\n<\/span>\"<\/span>,<\/span> xx<\/span>,<\/span> xx<\/span>)<\/span>\r\n\r\n    var<\/span> s<\/span> string<\/span> =<\/span> \"14\"<\/span>\r\n    i<\/span>,<\/span> _<\/span> :=<\/span>strconv<\/span>.<\/span>Atoi<\/span>(<\/span>s<\/span>)<\/span>\/\/\u8fd4\u308a\u5024\u304c2\u3064\u3042\u308b\u305f\u3081i\u3068_\u3092\u5ba3\u8a00\u3002<\/span>\r\n    fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"%T %v\"<\/span>,<\/span> i<\/span>,<\/span> i<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6570\u7ec4<\/p>\n
func<\/span> main<\/span>(){<\/span>\r\n    var<\/span> a<\/span>[<\/span>2<\/span>]<\/span>int<\/span>\/\/\u914d\u5217\u5185\u306f2\u3064\u3060\u3051<\/span>\r\n    a<\/span>[<\/span>0<\/span>]<\/span> =<\/span> 100<\/span>\r\n    a<\/span>[<\/span>1<\/span>]<\/span> =<\/span> 200<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>a<\/span>)<\/span>\/\/[100 200]<\/span>\r\n\r\n    var<\/span> b<\/span>[<\/span>2<\/span>]<\/span>int<\/span> =<\/span> [<\/span>2<\/span>]<\/span>int<\/span>{<\/span>100<\/span>,<\/span> 200<\/span>}<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>b<\/span>)<\/span>\/\/[100 200]<\/span>\r\n\r\n    var<\/span> c<\/span>[]<\/span>int<\/span> =<\/span> []<\/span>int<\/span>{<\/span>100<\/span>,<\/span> 200<\/span>}<\/span>\r\n    c<\/span>[<\/span>0<\/span>]<\/span> =<\/span> 500<\/span>\r\n    c<\/span>[<\/span>1<\/span>]<\/span> =<\/span> 600<\/span>\r\n    c<\/span> =<\/span> append<\/span>(<\/span>c<\/span>,<\/span> 700<\/span>)<\/span>\/\/\u914d\u5217\u306b\u5024\u8ffd\u52a0<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>c<\/span>)<\/span>\/\/[500 600 700]<\/span>\r\n\r\n\r\n\r\n    n<\/span> :=<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>}<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>n<\/span>)<\/span>\/\/[1 2 3 4 5]<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>n<\/span>[<\/span>2<\/span>])<\/span>\/\/3<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>n<\/span>[<\/span>2<\/span>:<\/span>4<\/span>])<\/span>\/\/[3 4]<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>n<\/span>[<\/span>:<\/span>4<\/span>])<\/span>\/\/[1 2 3 4]<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>n<\/span>[<\/span>2<\/span>:<\/span>])<\/span>\/\/[3 4 5]<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>n<\/span>[<\/span>:<\/span>])<\/span>\/\/[1 2 3 4 5]<\/span>\r\n\r\n    n<\/span>[<\/span>2<\/span>]<\/span> =<\/span> 100<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>n<\/span>)<\/span>\/\/[1 2 100 4 5]<\/span>\r\n\r\n    var<\/span> board<\/span> =<\/span> [][]<\/span>int<\/span>{<\/span>\r\n        []<\/span>int<\/span>{<\/span>0<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>},<\/span>\r\n        []<\/span>int<\/span>{<\/span>3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>},<\/span>\r\n        []<\/span>int<\/span>{<\/span>6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>},<\/span>\r\n    }<\/span>\r\n\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>board<\/span>)<\/span>\/\/[[0 1 2] [3 4 5] [6 7 8]]<\/span>\r\n\r\n    n<\/span> =<\/span> append<\/span>(<\/span>n<\/span>,<\/span> 100<\/span>,<\/span> 200<\/span>,<\/span> 300<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>n<\/span>)<\/span>\/\/[1 2 100 4 5 100 200 300]<\/span>\r\n\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5207\u6210\u8584\u7247 (qi\u0113<\/p>\n
\r\nfunc<\/span> main<\/span>(){<\/span>\r\n    n<\/span> :=<\/span> make<\/span>([]<\/span>int<\/span>,<\/span> 3<\/span>,<\/span> 5<\/span>)<\/span>\/\/(\u578b, \u9577\u3055, \u30ad\u30e3\u30d1\u30b7\u30c6\u30a3)<\/span>\r\n    fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"len=%d cap=%d value=%v<\/span>\\n<\/span>\"<\/span>,<\/span> len<\/span>(<\/span>n<\/span>),<\/span> cap<\/span>(<\/span>n<\/span>),<\/span> n<\/span>)<\/span>\/\/len=3 cap=5 value=[0 0 0]<\/span>\r\n\r\n    var<\/span> c<\/span> []<\/span>int<\/span>\r\n    c<\/span> =<\/span> make<\/span>([]<\/span>int<\/span>,<\/span> 5<\/span>)<\/span>\r\n    for<\/span> i<\/span> :=<\/span>0<\/span>;<\/span> i<\/span> <<\/span> 5<\/span>;<\/span> i<\/span>++<\/span>{<\/span>\r\n        c<\/span> =<\/span> append<\/span>(<\/span>c<\/span>,<\/span> i<\/span>)<\/span>\r\n    }<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>c<\/span>)<\/span>\/\/[0 0 0 0 0 0 1 2 3 4]<\/span>\r\n\r\n    c<\/span> =<\/span> make<\/span>([]<\/span>int<\/span>,<\/span> 0<\/span>,<\/span> 5<\/span>)<\/span>\r\n    for<\/span> i<\/span> :=<\/span>0<\/span>;<\/span> i<\/span> <<\/span> 5<\/span>;<\/span> i<\/span>++<\/span>{<\/span>\r\n        c<\/span> =<\/span> append<\/span>(<\/span>c<\/span>,<\/span> i<\/span>)<\/span>\r\n    }<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>c<\/span>)<\/span>\/\/[0 1 2 3 4]<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5730\u5716(\u9023\u7d50\u6578\u7d44)<\/p>\n
func<\/span> main<\/span>(){<\/span>\r\n    m<\/span> :=<\/span> map<\/span>[<\/span>string<\/span>]<\/span>int<\/span>{<\/span>\"apple\"<\/span>:<\/span> 100<\/span>,<\/span> \"banana\"<\/span>:<\/span> 200<\/span>}<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>m<\/span>)<\/span>\/\/map[apple:100 banana:200]<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>m<\/span>[<\/span>\"apple\"<\/span>])<\/span>\/\/100<\/span>\r\n    m<\/span>[<\/span>\"banana\"<\/span>]<\/span> =<\/span> 300<\/span>\r\n    m<\/span>[<\/span>\"new\"<\/span>]<\/span> =<\/span> 500<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>m<\/span>)<\/span>\/\/map[apple:100 banana:300 new:500]<\/span>\r\n\r\n    v<\/span>,<\/span> ok<\/span> :=<\/span> m<\/span>[<\/span>\"apple\"<\/span>]<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>v<\/span>,<\/span> ok<\/span>)<\/span>\/\/100 true<\/span>\r\n\r\n    v2<\/span>,<\/span> ok2<\/span> :=<\/span> m<\/span>[<\/span>\"nothing\"<\/span>]<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>v2<\/span>,<\/span> ok2<\/span>)<\/span>\/\/0 false<\/span>\r\n\r\n    m2<\/span> :=<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>int<\/span>)<\/span>\r\n    m2<\/span>[<\/span>\"pc\"<\/span>]<\/span> =<\/span> 5000<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>m2<\/span>)<\/span>\/\/map[pc:5000]<\/span>\r\n\r\n    var<\/span> a<\/span> map<\/span>[<\/span>string<\/span>]<\/span>int<\/span> =<\/span> map<\/span>[<\/span>string<\/span>]<\/span>int<\/span>{<\/span>\"apple\"<\/span>:<\/span> 100<\/span>,<\/span> \"banana\"<\/span>:<\/span> 200<\/span>}<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>a<\/span>)<\/span>\/\/map[apple:100 banana:200]<\/span>\r\n\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u517c\u804c<\/p>\n
func<\/span> main<\/span>(){<\/span>\r\n    b<\/span> :=<\/span> []<\/span>byte<\/span>{<\/span>72<\/span>,<\/span> 73<\/span>}<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>b<\/span>)<\/span>\/\/[72 73]<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>string<\/span>(<\/span>b<\/span>))<\/span>\/\/HI<\/span>\r\n\r\n    c<\/span> :=<\/span> []<\/span>int<\/span>{<\/span>72<\/span>,<\/span> 73<\/span>}<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>c<\/span>)<\/span>\/\/[72 73]<\/span>\r\n    \/\/fmt.Println(string(c))\/\/\u5909\u63db\u3067\u304d\u306a\u3044<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u51fd\u6570<\/p>\n
func<\/span> add<\/span>(<\/span>x<\/span>,<\/span> y<\/span> int<\/span>)<\/span> (<\/span>int<\/span>,<\/span> int<\/span>)<\/span> {<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"add function\"<\/span>)<\/span>\r\n    return<\/span> x<\/span> +<\/span> y<\/span>,<\/span> x<\/span> -<\/span> y<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> cal<\/span>(<\/span>price<\/span>,<\/span> item<\/span> int<\/span>)<\/span> (<\/span>result<\/span> int<\/span>){<\/span>\r\n    result<\/span> =<\/span> price<\/span> *<\/span> item<\/span>\r\n    return<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> convert<\/span>(<\/span>price<\/span> int<\/span>)<\/span> float64<\/span>{<\/span>\r\n    return<\/span> float64<\/span>(<\/span>price<\/span>)<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> foo<\/span>(<\/span>params<\/span> ...<\/span>int<\/span>){<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>len<\/span>(<\/span>params<\/span>),<\/span> params<\/span>)<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>(){<\/span>\r\n    r1<\/span>,<\/span> r2<\/span> :=<\/span> add<\/span>(<\/span>10<\/span>,<\/span> 20<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>r1<\/span>,<\/span> r2<\/span>)<\/span>\r\n\r\n    r3<\/span> :=<\/span> cal<\/span>(<\/span>100<\/span>,<\/span> 2<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>r3<\/span>)<\/span>\r\n\r\n    f<\/span> :=<\/span> func<\/span>(<\/span>x<\/span> int<\/span>){<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"inner func\"<\/span>)<\/span>\r\n    }<\/span>\r\n    f<\/span>(<\/span>1<\/span>)<\/span>\r\n\r\n    foo<\/span>(<\/span>10<\/span>,<\/span> 20<\/span>)<\/span>\/\/[10 20]<\/span>\r\n    foo<\/span>(<\/span>10<\/span>,<\/span> 20<\/span>,<\/span> 30<\/span>)<\/span>\/\/[10 20 30]<\/span>\r\n\r\n    s<\/span> :=<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>}<\/span>\r\n    foo<\/span>(<\/span>s<\/span>...<\/span>)<\/span>\/\/[1 2 3]<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u95ed\u5305<\/p>\n
func<\/span> incrementGenerater<\/span>()<\/span> (<\/span>func<\/span>()<\/span> int<\/span>)<\/span> {<\/span>\r\n    x<\/span> :=<\/span> 0<\/span>\r\n    return<\/span> func<\/span>()<\/span> int<\/span> {<\/span>\r\n        x<\/span>++<\/span>\r\n        return<\/span> x<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> circleArea<\/span>(<\/span>pi<\/span> float64<\/span>)<\/span> func<\/span>(<\/span>radius<\/span> float64<\/span>)<\/span> float64<\/span>{<\/span>\r\n    return<\/span> func<\/span>(<\/span>radius<\/span> float64<\/span>)<\/span> float64<\/span>{<\/span>\r\n        return<\/span> pi<\/span> *<\/span> radius<\/span> *<\/span> radius<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>(){<\/span>\r\n    counter<\/span> :=<\/span> incrementGenerater<\/span>()<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>counter<\/span>())<\/span>\/\/1<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>counter<\/span>())<\/span>\/\/2<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>counter<\/span>())<\/span>\/\/3<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>counter<\/span>())<\/span>\/\/4<\/span>\r\n\r\n    c1<\/span> :=<\/span> circleArea<\/span>(<\/span>3.14<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>c1<\/span>(<\/span>2<\/span>))<\/span>\/\/12.56<\/span>\r\n\r\n    c2<\/span> :=<\/span> circleArea<\/span>(<\/span>3<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>c2<\/span>(<\/span>2<\/span>))<\/span>\/\/12<\/span>\r\n}<\/span>\r\n\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u6570\u5b57\u7c7b\u578b func main(){ fmt.Println(“1 + 1 =”, 1+1)\/\/2 fmt.Pr […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44044","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nGolang\u7684\u7c7b\u578b\u5b9a\u4e49 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/golang\u7684\u7c7b\u578b\u5b9a\u4e49\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Golang\u7684\u7c7b\u578b\u5b9a\u4e49\" \/>\n<meta property=\"og:description\" content=\"\u6570\u5b57\u7c7b\u578b func main(){ fmt.Println("1 + 1 =", 1+1)\/\/2 fmt.Pr […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/golang\u7684\u7c7b\u578b\u5b9a\u4e49\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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