三数值整数浮点型小变大整数浮点值性格短长短短长整型整数签名单长一倍浮点丙提供几种不同类型的数值变量数值都不同,因为不同的记忆存储需求

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数值变量类型

丙提供几种不同类型的数值变量数值都不同,因为不同的记忆存储需求.这些数值不同类型课时,可以进行某些运算.

小整数需要更少记忆储存、你的电脑能完成这些数字运算很快.大整数和浮点值存储空间,更需要更多的时间则运算.利用适当变型,你确保你程序运行尽可能有效.

C的数值变量分为以下两大类:

  • 整数变量
  • 浮点变量

在每个这些类别是两个或多个特定变量类型. 鉴于未来表,显示内存量,字节,须持有单一可变每种.

种类煤焦可能等于或者签名或签名焦炭、 但它始终是这两种不同种类.

三是没有区别的文字或相应数值存放在一个变量、 所以也没有必要把一种功能性及其数值之间反之亦然. 至于其他类型的整数,如果你略去签名或签名将签署违约,例如 中国科学院与中国科学院签订了相当于.

中国科学院类型必须大于或等于类型短,和小于或等于类型久.如果你仅仅需要一些商店所不巨大价值的时候很好用型*;它的规模通常是最容易的处理器可以处理,所以最快.

丛书、双数相当于长一倍.事实上,结合工作职能,大多数数学型双重标准,始终是一个好理由,如果你有双重用途的类型同分数人数.

下表是为了更好地描述变量类型:

Variable Type

Keyword

Bytes Required

Range

Format

Character

char

1

-128 to 127

%c

Integer

int

2

-32768 to 32767

%d

Short integer

short

2

-32768 to 32767

%d

Long integer

long

4

-2,147,483,648 to 2,147,438,647

%ld

Unsigned character

unsigned char

1

0 to 255

%c

Unsigned integer

unsigned int

2

0 to 65535

%u

Unsigned short integer

unsigned short

2

0 to 65535

%u

Unsigned long integer

unsigned long

4

0 to 4,294,967,295

%lu

Single floating-point

float

4

-3.4E38 to 3.4E38

%f

Double floating-point

double

8

-1.7E308 to 1.7E308

%lf

Long double floating-point

long double

10

-1.7E4932 to 1.7E4932

%Lf


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Data Recovery with & without Programming


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BPB Publications, New Delhi, India
540
81-7656-922-4
$69.00 (Including Shipping Charges, Cost of Book and Other expenses, Free Source Code CD included with the Book)





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