𝐒𝐡𝐚𝐫𝐞 𝐲𝐨𝐮𝐫 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞. | Shalu Anand

𝐒𝐡𝐚𝐫𝐞 𝐲𝐨𝐮𝐫 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞.

𝐈𝐭’𝐬 𝐚 𝐰𝐚𝐲 𝐭𝐨

𝐚𝐜𝐡𝐢𝐞𝐯𝐞 𝐢𝐦𝐦𝐨𝐫𝐭𝐚𝐥𝐢𝐭𝐲.

with this,

𝗟𝗲𝘁'𝘀 𝗕𝗲𝗴𝗶𝗻 𝐰𝐢𝐭𝐡 𝐃𝐚𝐲 6 :

𝚜𝚎𝚛𝚒𝚎𝚜 𝚘𝚏 𝚜𝚑𝚊𝚛𝚒𝚗𝚐 𝚖𝚢 𝚔𝚗𝚘𝚠𝚕𝚎𝚍𝚐𝚎 𝚘𝚏 𝚝𝚑𝚎 𝙲 𝙻𝚊𝚗𝚐𝚞𝚊𝚐𝚎.

char *arr[20];

int fn(char);

int (*fp)(void);

char *strings[10][20];

𝐓𝐡𝐞 𝐟𝐨𝐥𝐥𝐨𝐰𝐢𝐧𝐠 𝐬𝐞𝐭 𝐨𝐟 𝐨𝐩𝐞𝐫𝐚𝐭𝐨𝐫𝐬 𝐰𝐢𝐭𝐡 𝐢𝐝𝐞𝐧𝐭𝐢𝐜𝐚𝐥 𝐩𝐫𝐞𝐜𝐞𝐝𝐞𝐧𝐜𝐞 𝐚𝐧𝐝 𝐚𝐬𝐬𝐨𝐜𝐢𝐚𝐭𝐢𝐯𝐢𝐭𝐲 𝐚𝐫𝐞 𝐫𝐞𝐮𝐬𝐞𝐝 𝐢𝐧 𝐝𝐞𝐜𝐥𝐚𝐫𝐚𝐭𝐨𝐫𝐬, 𝐧𝐚𝐦𝐞𝐥𝐲:

⚫ the unary * "dereference" operator which denotes a pointer;

⚫ the binary [] "array subscription" operator which denotes an array;

⚫ the (1+n)-ary () "function call" operator which denotes a function;

⚫ the () grouping parentheses which override the precedence and associativity of the rest of the listed operators.

𝐌𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐃𝐞𝐜𝐥𝐚𝐫𝐚𝐭𝐢𝐨𝐧𝐬

The comma can be used as a separator (*not* acting like the comma operator) in order to delimit multiple declarations within a single statement.

𝐓𝐡𝐞 𝐟𝐨𝐥𝐥𝐨𝐰𝐢𝐧𝐠 𝐬𝐭𝐚𝐭𝐞𝐦𝐞𝐧𝐭 𝐜𝐨𝐧𝐭𝐚𝐢𝐧𝐬 𝐟𝐢𝐯𝐞 𝐝𝐞𝐜𝐥𝐚𝐫𝐚𝐭𝐢𝐨𝐧𝐬:

int fn(void), *ptr, (*fp)(int), arr[10][20], num;

The declared objects in the above example are:

⚫ fn: a function taking void and returning int;

⚫ ptr: a pointer to an int;

⚫ fp: a pointer to a function taking int and returning int;

⚫ arr: an array of size 10 of an array of size 20 of int;

⚫ num: int.

𝐀𝐥𝐭𝐞𝐫𝐧𝐚𝐭𝐢𝐯𝐞 𝐈𝐧𝐭𝐞𝐫𝐩𝐫𝐞𝐭𝐚𝐭𝐢𝐨𝐧

Because declarations mirror use, a declaration can also be interpreted in terms of the operators that could be

applied over the object and the fifinal resulting type of that expression. The type that stands on the left-hand side is the fifinal result that is yielded after applying all operators.

char *arr[20];

int fn(char);

int (*fp)(void);

char *strings[10][20];