浮点值的下溢Underflow of Floating-Point Values

ANSI 4.5.1 对于下溢范围错误,数学函数是否将整数表达式 errno 设置为宏 ERANGE 的值ANSI 4.5.1 Whether the mathematics functions set the integer expression errno to the value of the macro ERANGE on underflow range errors

浮点下溢不会将表达式 errno 设置为 ERANGEA floating-point underflow does not set the expression errno to ERANGE. 当值接近零且最终下溢时,该值将设置为零。When a value approaches zero and eventually underflows, the value is set to zero.

另请参阅See Also

库函数Library Functions