Arithmetic 2 design ideas

1. Avoid duplication of topics:

Store two random numbers, operators, and calculation results for each random arithmetic question in a different array,

In the next question, compare the results of the calculation is the same,

If the same re-comparison operator is the same,

to avoid duplication;

2. Custom Quantity, printing method:

Add two variables and use a For loop to control;

3. using Rand to generate 0~3 to control the operator, just let it produce 0~1, The multiplication method can be removed;

The range of values can also be controlled by Rand;

Use (rand ()%2?-1:1) * (random number) to generate positive and negative numbers;

After generating two random numbers, the remainder is calculated, if the residue is 0, the output operation, if the remainder is not 0, can be skipped;

Arithmetic 2 design ideas