c语言—输入一行字符输出统计

#include <stdio.h>

int main()

{
	char c;

	int letters = 0, space = 0, digit = 0, other = 0;

	printf("请输入一行字符：");

	while ((c = getchar()) != '\n')

	{
		if (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')

		{
			letters++;
		}

		else if (c == ' ')

		{
			space++;
		}

		else if (c >= '0' && c <= '9')

		{
			digit++;
		}

		else

		{
			other++;
		}
	}

	printf("字母数:%d\n空格数:%d\n数字数:%d\n其他字符:%d\n", letters, space, digit, other);

	return 0;
}