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关于 c 语言的疑问

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  •   simple2025 Nov 30, 2018 3340 views
    This topic created in 2724 days ago, the information mentioned may be changed or developed.

    文件名: test.c 代码

    #include<stdio.h> main(int argc, char const *argv[]) { char *s1, *s2; s1 = argv[0]; s2=&argv[0]; printf("s1:%s\n", s1); printf("s2:%s\n", s2); return 0; } 

    输出结果

    s1:/home/cqh/code/ccode/ch2/test s2: 

    为什么 s2 是乱码呢?按理将不是应该一样的吗?

    10 replies    2018-12-01 22:49:05 +08:00
    heiher
        1
    heiher  
       Nov 30, 2018 via Android
    %p 打印看看就知道啦
    zynlp
        2
    zynlp  
       Nov 30, 2018 via iPhone
    你还是从头开始学吧
    1a0ma0
        3
    1a0ma0  
       Nov 30, 2018 via iPhone
    能一样嘛?一个是一个 pointer 一个是 pointer 的地址.....
    leido
        4
    leido  
       Nov 30, 2018 via Android
    s2 是指针数组的地址
    Halry
        5
    Halry  
       Nov 30, 2018 via Android
    s2 是取了地址啊,肯定显示不出
    kljsandjb
        6
    kljsandjb  
       Nov 30, 2018 via iPhone
    char **s2;
    leeZoom
        7
    leeZoom  
       Dec 1, 2018 via Android
    了解一下指针……
    dongfang
        8
    dongfang  
       Dec 1, 2018
    s1 和 s2 类型都不一样。
    s1 是 char 指针,s2 是指向 char 指针的指针。
    不要以为你一开始都定义为 char*,所以赋值之后 s1 和 s2 就一样了。
    赋值有强制类型转换,s2 不是 char*类型,是 char**类型。
    dongfang
        9
    dongfang  
       Dec 1, 2018
    指针重新看一遍吧
    liangzi
        10
    liangzi  
       Dec 1, 2018
    &取地址符号 取得了数组的地址?猜测
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