\n in fprintf in c

Question

I made a code that writes in a txt file how many times you want a letter but it doesnt go to a next line after giving the output

#include <stdio.h>
int main(){
int i=0;
int p=0;
printf("quante volte?");
scanf("%d",&p);
FILE *fp;
fp=fopen("file.txt","w");
while(i<p){
fprintf(fp, "a\n");
i++;}
fclose(fp);
return 0;}

Answer 1

The input is an int and the code is repeated so that a txt file is created and the letter "a" is repeated in the file for the number put in the input. If as an example i input 5 the file.txt file should be
a
a
a
a
a
But it is
aaaaa
instead

Answer 2

I simply open it from the folder where it is saved with notepad