This is a question related to the C language structure.

structure Date
{
    int year;
}

struct SCH
{
    char a[Max_Line][1024];
    char b[Max_Line][1024];
    struct Date c;
};

To define a structure, the first structure does not fail, but the following structure continues to be an unexpected token 'structure'. ';' does not exist. What's wrong with the error?