函数名: floor
头文件:<math.h>
函数原型: double floor(double x);
功 能: 向下舍入
参数:double x 为要操作的双精度值
返回值:返回 <=x 的用双精度浮点数表示的最大整数。
程序例: 求浮点数number的向下取整,并将结果输出
#include<stdio.h> #include<math.h> int main(void){ double number = 123.54; double down, up; down = floor(number); up = ceil(number); printf("original number %10.2lf\n", number); printf("number rounded down %10.2lf\n", down); printf("number rounded up %10.2lf\n", up); return 0; }
运行结果:
original number 123.54 number rounded down 123.00 number rounded up 124.00
本文固定URL:https://www.dotcpp.com/course/471