例如,在9.4-9.0-0.4版中:计算机是先将每个数字四舍五入并存储,还是借助一些额外的位(此示例为双精度格式)进行计算,然后将结果四舍五入?这些是存储的值,但是不确定如何手工执行此操作以检查是否先舍入每个数字。
binary(9.4)= 0 10000000010 00101100110011001100110011001100110011001100110011001101
二进制(-9.0)= 110000000010 0010000000000000000000000000000000000000000000000000000000000000
binary(-0.4)= 1 01111111101 1001100110011001100110011001100110011001100110011010
二进制(9.4-9.0-0.4)= 0 01111001100 0000000000000000000000000000000000000000000000000000000000