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C 语言 Math round() 函数

❮ 数学函数


示例

将数字四舍五入到最接近的整数

printf("%f", round(0.60));
printf("%f", round(0.40));
printf("%f", round(5));
printf("%f", round(5.1));
printf("%f", round(-5.1));
printf("%f", round(-5.9));
自己尝试 »

定义和用法

round() 函数将数字四舍五入到最接近的整数。如果小数部分正好是 0.5,则它会远离零进行四舍五入,即四舍五入到绝对值最大的整数。

round() 函数在 <math.h> 头文件中定义。


语法

以下之一

round(double number);

参数值

参数 描述
number 必需。指定一个数字。

技术细节

返回值 一个 double 值,表示最接近数字的整数。

❮ 数学函数


相关页面

C 函数教程

C 数学函数教程


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