Add no. & Save in file

//Created By "Arunendra Kumar"//
#include<stdio.h>
#include<conio.h>
int add()
{
int x,y,a;
printf("Enter the value of x,y\n");
scanf("%d%d",&x,&y);
a=x+y;
printf("Sum=%d",a);
getch();
return a;

}
void main()
{
int n,x,y;
clrscr();
FILE *z;
z=fopen("c:\\Addition.txt","a");
if(z==NULL)
{
printf("Error");
getch();

}
n=add();
printf("%d",n);
fprintf(z,"\nno.s are %d ,%d",x,y);
fprintf(z,"  Sum = %d ",n);
fclose(z);

}
getch();