rounding mode matlab,round函数

Function: round roundf roundl

Synopsis

#include long double roundl(long double x);double round(double x);float roundf(float x);Description

The round functions will return a rounded integer in the specified format that will be rounded to the nearest integer regardless of the current rounding mode.

Returns

The rounded value.

例子：

ceil(x)返回不小于x的最小整数值(然后转换为double型)。

floor(x)返回不大于x的最大整数值。

round(x)返回x的四舍五入整数值。round函数

#include

#include

int main(int argc, const char *argv[])

{

float num = 1.4999;

printf("ceil(%f) is %fn", num, ceil(num));

printf("floor(%f) is %fn", num, floor(num));

printf("round(%f) is %fn", num, round(num));

return 0;

}

编译：$cc test.c -lm

执行：$./a.out

ceil(1.499900) is 2.000000

floor(1.499900) is 1.000000

round(1.499900) is 1.000000