#include <stdio.h>

char* test1 (char in[])
{
	in = "test 1 \n";
	return in;
}

char* test2 (char* in)
{
	in = "test 2 \n";
	return in;
}

int main(void)
{
	char a[255] = "error";
	char*b = test1(a);
	printf(b);
	char*c = test2(a);
	printf(c);
	return 0;
}