c - 如何使用 DOT 运算符初始化结构类型的数组

Question

我试图在 main() 中初始化一个结构类型的数组，但编译器返回错误 field designator cannot initialize a non-struct, non-union type 我的代码:

struct details{
    const char *author;
    const char *title;
};


int main()
{
    const char *input = "Data Structures and Algorithm";
    struct details a [] = { 
        .author = "Narsimha", 
        .title = input
    };  
    printf("%s\n", a[0].author);
    printf("%s\n", a[0].title);

    return 0;
}
gcc inputs.c 
inputs.c:16:9: error: field designator cannot initialize a non-struct, non-union type 'struct details []'
        .author = "Narsimha", 
        ^
inputs.c:17:9: error: field designator cannot initialize a non-struct, non-union type 'struct details []'
        .title = input
        ^
2 errors generated.

Answer 1

你少了一对牙套。试试这个:

struct details a [] = {{ 
        .author = "Narsimha", 
        .title = input
    }};

外括号用于定义数组。内部大括号用于 struct。