writer

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

int main()
{
	const char *filename = "myfile.txt";
	const char *mode = "w";

	FILE *p = fopen(filename, mode);

	if (p == NULL)
	{
		printf("Error! Cannot open file: %s\n", filename);
		return 1;
	}

	char text[] = "Hello!Hello!Hello!Hello!Hello!";

	for (int i=0; i<strlen(text); i++)
	{
		fseek(p, 0, SEEK_SET);
		fputc(text[i], p);
	}

	/*
	int elem = fwrite(text, strlen(text), 1, p);

	if (elem == 0)
	{
		printf("Cannot write to file!\n");
	}
	*/

	fclose(p);

	return 0;
}