#include <stdio.h>    /* C example: K&R C book, pp. 160-161, 242 */
#include <stdlib.h>

int main()
{
	FILE *out1;
	FILE *out2;

	out1 = fopen("outfile1", "w");   /* overwrite */
	if (out1 == NULL) {
		fprintf(stderr, "can't open outfile1\n");
		return EXIT_FAILURE;
	}

	out2 = fopen("outfile2", "a");   /* append */
	if (out2 == NULL) {
		fprintf(stderr, "can't open outfile2\n");
		return EXIT_FAILURE;
	}

	fprintf(out1, "hello\n");
	fprintf(out2, "goodbye\n");

	fclose(out1);
	fclose(out2);
	return EXIT_SUCCESS;
}