Answered: For this C code, find the values of a,…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

For this C code, find the values of a, b, c and d that give hit = 1, and the result

#include <stdio.h>
#include <stdlib.h>
void end_now();
char *next_input();

int hash = 8765309;
int INPUTS[4];

void phase03(){
// TODO: put numbers in input.txt to pass the code below
int a;
int b;
int c;
int d;

int targ = 0;
targ |= 1 << (hash % 13);
targ = targ << (hash % 3);
targ |= 1 << (hash % 19);
targ = targ << (hash % 5);
targ |= 1 << (hash % 31);
targ = targ << (hash % 7);

int shot = 0;
shot |= 1 << a;
shot |= 1 << b;
shot |= 1 << c;
shot |= 1 << d;

int hit = shot ^ targ;
hit = !hit;

if(hit){
printf("Right on target: nice shootin' bitslinger!\n");
return;
}

printf("Shifty bits hit? Xor not it seems...\n");
end_now();
}

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