c语言中ceil函数怎么用？

用 法: double ceil(double x)

功 能: 返回大于或者等于指定表达式的最小整数

头文件:math.h

说明：

float ceil ( float value )

返回不小于 value 的下一个整数，value 如果有小数部分则进一位。ceil() 返回的类型仍然是 float，因为 float 值的范围通常比 integer 要大。

#include<stdio.h>

#include<math.h>

intmain(void)

{

double number=123.54

double down,up

down=floor(number)

up=ceil(number)

printf("originalnumber%5.2lf\n",number)

printf("numberroundeddown%5.2lf\n",down)

printf("numberroundedup%5.2lf\n",up)

return0

}

运行结果：

originalnumber123.54

numberroundeddown123.00

numberroundedup124.00

先用一个变量存储这个数假设是num再把<%=Math.ceil(1.002)%>改一下

<%

dim sz

sz=52.001

if(sz>cint(sz)) then

Response.write(Cstr(Cint(sz+1)))

else

Response.write(Cstr(cint(sz)))

end if

%>

select ceil(7.2) as cc from dual

cc

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8

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In Oracle/PLSQL, the ceil function returns the smallest integer value that is greater than or equal to a number.

The syntax for the ceil function is:

ceil( number )

number is the value used to find the smallest integer value.

Applies To:

Oracle 8i, Oracle 9i, Oracle 10g, Oracle 11g

For Example:

ceil(32.65) would return 33.

ceil(32) would return 32.

ceil(-32.65) would return -32.

ceil(-32) would return -32.

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