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发表于 2023-10-26 20:23:09
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getchar() is a function in C language that reads a single character from the standard input (usually the keyboard) and returns its ASCII value as an integer. The two code snippets you provided involve different conditions for reading characters using getchar():
1. while((c=getchar())!='\n');
This code snippet reads characters until a newline character ('\n') is encountered. It means the loop will continue until you press the Enter key. The newline character itself is read but typically not stored or used in further processing.
2. while((c=getchar())!=EOF);
This code snippet reads characters until the end-of-file (EOF) character is encountered. On most systems, you can signal EOF by pressing Ctrl+Z (Windows) or Ctrl+D (Unix/Linux) while entering input through the console. It indicates the end of the input stream.
The difference between these two conditions is what triggers the termination of the loop. In the first case, the loop ends when a newline character is entered, while in the second case, it ends when the end-of-file character is encountered.
请注意,本回答来自GPT-4
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