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C语言有以下几种取整方法：
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1、直接赋值给整数变量。如：
int
i
=
2.5;
或
i
=
(int)
2.5;
这种方法采用的是舍去小数部分
2、C/C++中的整数除法运算符“/”本身就有取整功能(int
/
int)，但是整数除法对负数的取整结果和使用的C编译器有关。
3、使用floor函数。floor(x)返回的是小于或等于x的最大整数仿汪粗。如：
floor(2.5)
=
2
floor(-2.5)
=
-3
4、使用ceil函陵嫌数。ceil(x)返回的是大于x的最小整数。如：备镇
ceil(2.5)
=
3
ceil(-2.5)
=
-2
floor()是向负无穷大舍入，floor(-2.5)
=
-3；ceil()是向正无穷大舍入，ceil(-2.5)
=
-2。
int a = 10;这是定义一个握蠢变量a
int Sort()
｛
return 0；
｝
这是返回碰闹整型数段吵陪的函数
通常泛指char、short int、int、long int、long long int这五种类型（包括signed和unsigned）以及_Bool类型。兆闷当然也包括编译器作为扩展态猜源而实现的某些整型类型。
见C11标准帆态：
[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.
整形函数做腔就是整数
比方说4
10
非整形函数包括
浮点型
非常数型
带
小数点
的都纯闷衫叫非罩首整形~