c = getchar()) != ' N' and for loop

learnedfor loop,In practice when it came to getchar()) != ‘n’ The problem。I.e.while loopSo that in thefor loopEnter the void (to be treated as a character。)

All to known,getchar functionUsed to get the character,And if the direct use in a loop,It found that the situation will not be able to press enter characters into the system。The reason is the carriage return character is so ~,At the same time we want to add[……]

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