#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char s[5];

char *str (int k) {
	char *rtn;
	int i;
	rtn = (char *) malloc (k);
	for (i=0; i<k-1; i++) {
		rtn[i] = 'x';
	}
	rtn[k-1] = '\0';
	return rtn;
}

int main ( ) {
	char s1[] = "abc";
	int a1[] = {3, 1, 4};
	char *s2 = "def";
	char *p1 = str(4);
	char *p2;
	int *a3;
	strcpy (s, p1);
	p2 = s1;
	a3 = a1;
	return 0;
}