C语言练习6

学习getchar（）函数

#include
int main()
{
	char c;
	int letters = 0, spaces = 0, digits = 0, others = 0;
	printf("请输入一些字母：n");
	while ((c = getchar()) != 'n')
	{
		if ((c >= 'a'&&c <= 'z') || (c >= 'A'&&c <= 'Z'))
			letters++;
		else if (c >= '0'&&c <= '9')
			digits++;
		else if (c == ' ')
			spaces++;
		else
			others++;
	}
	printf("字母=%d,数字=%d,空格=%d,其他=%dn", letters, digits, spaces, others);
	return 0;
}