Analog calculator for arithmetic (same priority) (2nd 3rd)

Topic Requirements

Problem Description : Analog calculator for arithmetic. Assume that only + 、-、 *,/, = Five operators, and that they have equal precedence. The calculation results are displayed when you enter =.

Sample Input : 8.5+0.5*2.5=

Sample Output : 22.5

Solution Solutions

Compared with the need to consider the priority, and there are many operators of the topic, the problem is obviously much simpler, directly read the input and analysis, and then calculate.

Source code Example

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Summary

Although the topic is simple, consider the details, such as the first number is negative. In addition, the Model code does not check the abnormal input, so if it is written rigorous procedures, in order to ensure robustness, must be careful error checking.

Analog calculator for arithmetic (same priority) (2nd 3rd)