fprintf and writing on the screen at the same time

[Prolapsis]

Hi

I'm learning files in C languagem but I'm with a problem. I always thought that when we do a fprintf to write something into a file (in this case using "a") this something would be written in the debug display :S

I tested with this program but nothing is written in the debug:

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

int main()
{
	FILE * xyz;
	
	
	xyz = fopen("example.txt","a");
	fprintf(xyz,"12345\n");
	fclose(xyz);

	xyz = fopen("example.txt","a");
	fprintf(xyz,"67890\n");
	fclose(xyz);

	system("pause");

	return 0;
}

Is there any way or some process to write into a file and to the debug screen at the same time?

I'm really confused :S