c语言ceil函数_ceil（）函数以及C ++中的示例

c语言ceil函数

C ++ ceil()函数 (C++ ceil() function)

ceil() function is a library function of cmath header, it is used to find the roundup (upward) value of the given number, it accepts a number and returns the smallest integral value that is not less than to the given number.

ceil()函数是cmath标头的库函数，用于查找给定数字的向上舍入值，它接受一个数字并返回不小于给定数字的最小整数值。

Syntax of ceil() function:

ceil()函数的语法：

    ceil(x);

Parameter(s): x – is the number whose value to round up.

参数： x –是要向上舍入的数字。

Return value: double – it returns double type value that is the rounded up value of the given number.

返回值： double-返回double类型值，该值是给定数字的四舍五入值。

Example:

例：

    Input:
    float x = 2.3;
    Function call:
    ceil(x);
    Output:
    3

    Input:
    float x = 3.8
    Function call:
    ceil(x);
    Output:
    4

C ++代码演示ceil()函数的示例 (C++ code to demonstrate the example of ceil() function)

// C++ code to demonstrate the example of 
// ceil() function

#include <iostream>
#include <cmath>
using namespace std;

// main() section
int main()
{
    float x;
    
    //input the number
    cout<<"Enter a float value: ";
    cin>>x;
    
    //printing the round up value
    cout<<"ceil("<<x<<"): "<<ceil(x)<<endl;

    return 0;
}

Output

输出量

First run:
Enter a float value: 2.3 
ceil(2.3): 3

Second run:
Enter a float value: 3.8 
ceil(3.8): 4 

Third run:
Enter a float value: -2.3
ceil(-2.3): -2 

Fourth run:
Enter a float value: -3.8
ceil(-3.8): -3 

翻译自: https://www.includehelp.com/cpp-tutorial/ceil-function-with-example.aspx

c语言ceil函数