𝐈𝐟 𝐲𝐨𝐮 𝐡𝐚𝐯𝐞 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞, 𝐥𝐞𝐭 𝐨𝐭𝐡𝐞𝐫𝐬 𝐥𝐢𝐠𝐡𝐭 𝐭𝐡𝐞𝐢𝐫 𝐜𝐚𝐧𝐝𝐥𝐞𝐬 𝐢𝐧 𝐢𝐭. | Shalu Anand

𝐈𝐟 𝐲𝐨𝐮 𝐡𝐚𝐯𝐞 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞, 𝐥𝐞𝐭 𝐨𝐭𝐡𝐞𝐫𝐬 𝐥𝐢𝐠𝐡𝐭 𝐭𝐡𝐞𝐢𝐫 𝐜𝐚𝐧𝐝𝐥𝐞𝐬 𝐢𝐧 𝐢𝐭.

with this,

𝗟𝗲𝘁'𝘀 𝗕𝗲𝗴𝗶𝗻 𝐰𝐢𝐭𝐡 𝐃𝐚𝐲 7 :

𝚜𝚎𝚛𝚒𝚎𝚜 𝚘𝚏 𝚜𝚑𝚊𝚛𝚒𝚗𝚐 𝚖𝚢 𝚔𝚗𝚘𝚠𝚕𝚎𝚍𝚐𝚎 𝚘𝚏 𝚝𝚑𝚎 𝙲 𝙻𝚊𝚗𝚐𝚞𝚊𝚐𝚎.

𝐅𝐢𝐱𝐞𝐝 𝐖𝐢𝐝𝐭𝐡 𝐈𝐧𝐭𝐞𝐠𝐞𝐫 𝐓𝐲𝐩𝐞𝐬

The header <𝐬𝐭𝐝𝐢𝐧𝐭.𝐡> provides several fixed-width integer type definitions. These types are optional and only provided if the platform has an integer type of the corresponding width, and if the corresponding signed type has a two's complement representation of negative values.

𝐒𝐞𝐞 𝐭𝐡𝐞 𝐛𝐞𝐥𝐨𝐰 𝐬𝐞𝐜𝐭𝐢𝐨𝐧 𝐟𝐨𝐫 𝐮𝐬𝐚𝐠𝐞 𝐡𝐢𝐧𝐭𝐬 𝐨𝐟 𝐟𝐢𝐱𝐞𝐝 𝐰𝐢𝐝𝐭𝐡 𝐭𝐲𝐩𝐞𝐬.

/* commonly used types include */

uint32_t u32 = 32; /* exactly 32-bits wide */

uint8_t u8 = 255; /* exactly 8-bits wide */

int64_t i64 = -65 /* exactly 64 bit in two's complement representation */

𝐈𝐧𝐭𝐞𝐠𝐞𝐫 𝐭𝐲𝐩𝐞𝐬 𝐚𝐧𝐝 𝐜𝐨𝐧𝐬𝐭𝐚𝐧𝐭𝐬

Signed integers can be of these types (the int after short, or long is optional):

signed char c = 127; /* required to be 1 byte, see remarks for further information. */

signed short int si = 32767; /* required to be at least 16 bits. */

signed int i = 32767; /* required to be at least 16 bits */

signed long int li = 2147483647; /* required to be at least 32 bits. */

signed long long int li = 2147483647; /* required to be at least 64 bits */

Each of these signed integer types has an unsigned version.

unsigned int i = 65535;

unsigned short = 2767;

unsigned char = 255;

For all types but char the signed version is assumed if the signed or unsigned part is omitted. The type char constitutes a third character type, difffferent from signed char and unsigned char and the signedness (or not) depends on the platform.

Decimal constants are always signed. Hexadecimal constants start with 0x or 0X and octal constants start just with a 0. The latter two are signed or unsigned depending on whether the value fifits into the signed type or not.