getline.c

unix环境下实现的cmm语言编译器

int getchar(void);
/*getline: 将一行读入到s中返回其长度*/
int getline(char s[], int lim)
{
	int c, i;
	
	i = 0;
	while ((c = getchar()) != -1) {
		if (c == '\n')
			break;
		if (i == lim - 1)
			break;
		s[i] = c;
		i = i + 1;
	}
	if (c == '\n') {
		s[i] = c;
		i = i + 1;
	}
	s[i] = 0;
	return i;
}