View Code of Problem 43

#include<stdio.h>
#include<math.h>
int shizi(char a)
{
	if((a>='A'&&a<='Z')||(a>='a'&&a<='z'))
		return 1;
	return 0;
}
int main()
{
	char a[100];
	gets(a);
	int i;
	for(i=0;a[i]!='\0';i++)
	{
		if(shizi(a[i])) putchar(a[i]);
	}
	printf("\n");
	return 0;
}