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

int main (int argc, char **argv)	{
	FILE *fd;
	fd = fopen("./A","r+");
printf(" %d \n",errno);
printf(" %s \n",strerror(errno));
	fprintf(fd,"a test\n");
	fclose(fd);
}