Sese linux 10下面的oracle的C開發結構體編譯

下面這兩種方法可行：
EXEC SQL BEGIN DECLARE SECTION;
typedef struct
{
  int a;
  int b;
}abc;
EXEC SQL END DECLARE SECTION;

struct bbb
{
  int a;
  int b;
};

EXEC SQL BEGIN DECLARE SECTION;
    VARCHAR username[20];
    VARCHAR password[20];
    abc a;
    struct bbb b;
EXEC SQL END DECLARE SECTION;

EXEC SQL INCLUDE sqlca;
int main()
{
    strcpy(username.arr,"pcsp");
    username.len=strlen(username.arr);
    strcpy(password.arr,"pcsp");
    password.len=strlen(password.arr);

    EXEC SQL CONNECT:username IDENTIFIED BY:password;
    printf("/nCOnnect to ORACLE as user;%s/n",username.arr);
    return 0;

}