錯誤：預期「;」，標識符或「（」「結構」

Question

struct proc_time /* info and times about a single process*/ 
{ 
    pid_t pid; /* pid of the process*/ 
    char name[16]; /* file name of the program executed*/ 
    unsigned long start_time; /* start time of the process*/ 
    unsigned long real_time; /* real time of the process execution*/ 
    unsigned long user_time; /* user time of the process*/ 
    unsigned long sys_time; /* system time of the process*/ 
}; 

struct proctimes /* info and times about all processes we need*/ 
{ 
    struct proc_time proc; /* process with given pid or current process */ 
    struct proc_time parent_proc; /* parent process*/ 
    struct proc_time oldest_child_proc; /* oldest child process*/ 
    struct proc_time oldest_sibling_proc; /* oldest sibling process*/ 
}; 

之前，我不明白什麼是我的聲明去錯了，我收到以下錯誤在該行的第二struct開始：

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Answer 1

問題是你正在使用/.../作爲註釋分隔符這是違法的行：

struct proc_time proc; /process with given pid or current process/ 

應改爲：

struct proc_time proc; /* process with given pid or current process */ 

Answer 2

有沒有真正的理由，如果你在文件範圍聲明這些結構（假設你固定您的評論的問題）會發生這種情況。

然而，如果你總算來聲明一個更大的結構中，這些結構，那麼你確實會從C編譯器得到一個錯誤

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在C語言中是違法的「嵌套聲明結構類型「沒有立即聲明該類型的數據字段的時尚。

Answer 3

在分號前和結束大括號之後添加struct aliases，允許我編譯結構（在添加main方法幷包含stdlib.h後使用gcc）。

struct proc_time /* info and times about a single process*/ 
{ 
    pid_t pid; /* pid of the process*/ 
    char name[16]; /* file name of the program executed*/ 
    unsigned long start_time; /* start time of the process*/ 
    unsigned long real_time; /* real time of the process execution*/ 
    unsigned long user_time; /* user time of the process*/ 
    unsigned long sys_time; /* system time of the process*/ 
} proc_time; 

struct proctimes /* info and times about all processes we need*/ 
{ 
    struct proc_time proc; /* process with given pid or current process */ 
    struct proc_time parent_proc; /* parent process*/ 
    struct proc_time oldest_child_proc; /* oldest child process*/ 
    struct proc_time oldest_sibling_proc; /* oldest sibling process*/ 
} proctimes;