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c語言函數(shù)值整型 c語言整型除以整型

C語言中函數(shù)值為整型中整型是什么意思?

通常泛指char、short int、int、long int、long long int這五種類型(包括signed和unsigned)以及_Bool類型。當然也包括編譯器作為擴展而實現(xiàn)的某些整型類型。

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見C11標準:

[6.2.5-4]There are five standard signed integer types, designated as signed char, short int, int, long int, and long long int. (These and other types may be designated in several additional ways, as described in 6.7.2.) There may also be implementation-defined extended signed integer types. The standard and extended signed integer types are collectively called signed integer types.

[6.2.5-6]For each of the signed integer types, there is a corresponding (but different) unsigned integer type (designated with the keyword unsigned) that uses the same amount of storage (including sign information) and has the same alignment requirements. The type _Bool and the unsigned integer types that correspond to the standard signed integer types are the standard unsigned integer types. The unsigned integer types that correspond to the extended signed integer types are the extended unsigned integer types. The standard and extended unsigned integer types are collectively called unsigned integer types.

c語言中有哪些函數(shù)可以取整?

C語言有以下幾種取整方法:

1、直接賦值給整數(shù)變量。如:

int

i

=

2.5;

i

=

(int)

2.5;

這種方法采用的是舍去小數(shù)部分

2、C/C++中的整數(shù)除法運算符“/”本身就有取整功能(int

/

int),但是整數(shù)除法對負數(shù)的取整結果和使用的C編譯器有關。

3、使用floor函數(shù)。floor(x)返回的是小于或等于x的最大整數(shù)。如:

floor(2.5)

=

2

floor(-2.5)

=

-3

4、使用ceil函數(shù)。ceil(x)返回的是大于x的最小整數(shù)。如:

ceil(2.5)

=

3

ceil(-2.5)

=

-2

floor()是向負無窮大舍入,floor(-2.5)

=

-3;ceil()是向正無窮大舍入,ceil(-2.5)

=

-2。

這兩個函數(shù)在VC++中也能使用,但使用時需要包含math.h文件。要在程序的開始添加如下代碼:

#include

math.h

c語言中整型函數(shù)的概念,應該怎么應用!

int a = 10;這是定義一個變量a

int Sort()

return 0;

這是返回整型數(shù)的函數(shù)

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