题解 | 判断是不是字母

#include <stdio.h>


int main()
{
	char ch1 = '0'; 
	while (scanf("%c", &ch1) != EOF)
	{
		if (ch1 == '\n')
		{
			continue; 
		}
		if (ch1 >= 65 && ch1 <= 90 || ch1 >= 90 && ch1 <= 122)
		{
			printf("%c is an alphabet.\n", ch1); 
		}
		else
		{
			printf("%c is not an alphabet.\n", ch1);
		}
	}
	return 0; 
}