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Why output this? Don't you understand?
2022-01-26 22:00:40 【CSDN Q & A】
Refer to the answer 1：
Layer 1 cycle ：x -= 2 Equivalent to x = x - 2, So the output 1, then while Inside !(--x) As the result of the 1, Go on to the next cycle （ Now x become 0）;
The second cycle ：x -= 2 Equivalent to x = x - 2, So the output -2 , then while Inside !(--x) As the result of the 0, End of cycle ;
Refer to the answer 2：
Refer to the answer 3：
Don't look at the short code , This is about 3 A knowledge
1.do,while In circulation , Execute first do, To determine .
2.--x, Execute first --, Then take
3.int Type conversion bool In the implicit conversion of type ,0=false, Not 0=true
Okay , First cycle ,x-=2, here x=1, Output 1, then --x,x become 0,0 be equal to false, Reverse becomes true, So it goes into the second cycle
The second cycle ,x become -2, Output -2,-2 turn bool yes true, Reverse transformation false, If the condition is not satisfied, jump out of the loop
Refer to the answer 4：
author[CSDN Q & A],Please bring the original link to reprint, thank you.
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