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initialize a struct array in c – Debian

Can I initialize a stuct in C in the following way:

struct database {
  char* Name;
  char* Title;
  char* DOB;
  int EmployeeNo;
} people[100];

people[0] = { "Jon", "Manager", "1-1-1990", 12345 };
people[1] = { "Bob", "Accountant", "1-1-1990", 54321 };

I am using gcc version 9.2.1 20191130 (Debian 9.2.1-21)

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3

Answers


  1. 0

    No, do it like this:

    struct database {
    char* Name;
    char* Title;
    char* DOB;
    int EmployeeNo;
};

struct database ppl[5] = {
    { .Name = "Jon",  .Title = "Manager", .DOB = "1-1-1990", .EmployeeNo = 12345 },
    { .Name = "Ravi", .Title = "Manager", .DOB = "1-1-1990", .EmployeeNo = 12345 },
    {.....},
    {.....},
    {.....},
};

    Initialization and definition must be done at the same time — otherwise, you’re assigning, not initializing.

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  2. 0

    No, the correct way is:

    struct database {
  char* Name;
  char* Title;
  char* DOB;
  int EmployeeNo;
} people[100]={ { "Jon", "Manager", "1-1-1990", 12345 },
                { "Bob", "Accountant", "1-1-1990", 54321 }
              };

    This is usable in C89, C90, C94, C99, C11, C17 — and pre-standard C if the initialization is done at file scope.

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  3. 0

    Can I initialize a stuct in C in the following way:

    Not quite.
    There are other ways to initialize as provided by other answers.
    You can assign within a function with a compound literal.

    people[0] = 
    (struct database){ "Jon", "Manager", "1-1-1990", 12345 };
people[1] = 
    (struct database){ "Bob", "Accountant", "1-1-1990", 54321 };
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