View Code of Problem 43

#include<stdio.h>
#include<string.h>
int isLetter(char c);
int main()
{
	char s[85];
	int len, i;
	scanf("%s", s);
	len = strlen(s);
	for (i = 0; i < len; i++)
	{
		if (isLetter(s[i]))
			printf("%c", s[i]);
	}
	return 0;
}

int isLetter(char c)
{
	if (c >= 'A'&&c <= 'Z' || c >= 'a'&&c <= 'z')
		return 1;
	else
		return 0;
}