The function that allows the adding of one to the least significant digit in the result of a calculation together with the necessary carries, if any of the highest decimal places dropped off has a value of more than zero.

• 一种功能，若计算结果的舍弃部分最高位的十进位数字大于零，则使结果中的最低位有效数字加1，并进行必要的进位。