(二)原码、反码、补码计算机中的数有正负之分。故在二进制数的最高位设符号位,该位为○表示正,为1表示负。该数连同符号位一起称为机器数。原来的数值称为机器数的真值。常用的机器数有三种:原码、反码、补码。1.原码:①原码最高符号化为0时表示真值为正,为1时真值为负。②0在原码中 (B) the original code, anti-code, complement code The number of positive and negative points in the computer. Therefore, the most significant bit in the binary number to set the sign bit, the bit is ○ that positive, 1 for negative. This number, along with the sign bit, is called the number of machines. The original value is called the true value of the number of machines. There are three commonly used machines: the original code, anti-code, complement code. 1. The original code: ① The highest symbol of the original code is 0 when the true value is positive, a true value of 1 negative. ② 0 in the original code