这道题应该怎么做---14. 如图是一个“数值转换机”, 若输入的数 x = -1.5, 则输出的结果为
Chart Description:
Type: Flowchart.
Main Elements:
- A rectangular box labeled "输入 x" (Input x). An arrow points from this box to the next.
- A rectangular box labeled "× (-2)" (Multiply by -2). An arrow points from the previous box to this box.
- A rectangular box labeled "+1" (Add 1). An arrow points from the previous box to this box.
- A diamond shape or rectangular box with a question/condition, labeled "≥10" (Greater than or equal to 10). An arrow points from the previous box to this box.
- From the "≥10" box, two arrows emerge:
- One arrow labeled "是" (Yes) points to a rectangular box labeled "输出" (Output).
- Another arrow labeled "否" (No) points upwards and then left, looping back to the arrow between "输入 x" and "× (-2)". This indicates the result after "+1" is fed back as the input for the "× (-2)" step if the condition "≥10" is false.
Other Relevant Text:
- "输入的数 x = -1.5" (Input number x = -1.5)
Mathematical Formulas/Operations:
- Multiplication: × (-2)
- Addition: +1
- Condition: ≥10
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这是一个数值转换机问题。我们需要根据给定的流程图,计算当输入 x 等于负一点五时的输出结果。转换流程是:首先输入数值,然后乘以负二,接着加一,判断结果是否大于等于十。如果是,则输出结果;如果不是,则将当前结果作为新的输入值,重新进行计算。
现在开始第一次计算。输入 x 等于负一点五。首先计算负一点五乘以负二,得到三。然后加一,得到四。接下来判断四是否大于等于十。显然四小于十,所以条件不满足,需要将四作为新的输入值继续下一轮计算。
进行第二次计算。现在输入 x 等于四。计算四乘以负二,得到负八。然后加一,得到负七。判断负七是否大于等于十。显然负七小于十,条件仍然不满足,需要将负七作为新的输入值继续下一轮计算。
进行第三次计算。现在输入 x 等于负七。计算负七乘以负二,得到十四。然后加一,得到十五。判断十五是否大于等于十。十五大于十,条件满足!因此输出最终结果十五。
总结一下整个计算过程。输入 x 等于负一点五后,经过三次循环计算。第一次得到四,第二次得到负七,第三次得到十五。只有十五满足大于等于十的条件,因此最终输出结果为十五。