Detectar si dos números enteros tienen signos opuestos

Dados dos enteros con signo, escriba una función que devuelva verdadero si los signos de los enteros dados son diferentes, de lo contrario, falso. Por ejemplo, la función debería devolver verdadero -1 y +100 y debería devolver falso para -100 y -200. La función no debe usar ninguno de los operadores aritméticos. 
Sean x e y los enteros dados. El bit de signo es 1 en números negativos y 0 en números positivos. El XOR de xey tendrá el bit de signo 1 si tienen signo opuesto. En otras palabras, XOR de xey será un número negativo si xey tienen signos opuestos. El código siguiente utiliza esta lógica. 
 

// C++ Program to Detect
// if two integers have opposite signs.
#include<iostream>
using namespace std;
  
bool oppositeSigns(int x, int y)
{
    return ((x ^ y) < 0);
}
  
int main()
{
    int x = 100, y = -100;
    if (oppositeSigns(x, y) == true)
    cout << "Signs are opposite";
    else
    cout << "Signs are not opposite";
    return 0;
}
  
// this code is contributed by shivanisinghss2110

// C++ Program to Detect  
// if two integers have opposite signs. 
#include<stdbool.h> 
#include<stdio.h> 
    
bool oppositeSigns(int x, int y) 
{ 
    return ((x ^ y) < 0); 
} 
    
int main() 
{ 
    int x = 100, y = -100; 
    if (oppositeSigns(x, y) == true) 
       printf ("Signs are opposite"); 
    else
      printf ("Signs are not opposite"); 
    return 0; 
}

// Java Program to Detect  
// if two integers have opposite signs. 
    
class GFG { 
    
    static boolean oppositeSigns(int x, int y) 
    { 
        return ((x ^ y) < 0); 
    } 
        
    public static void main(String[] args) 
    { 
        int x = 100, y = -100; 
        if (oppositeSigns(x, y) == true) 
            System.out.println("Signs are opposite"); 
        else
            System.out.println("Signs are not opposite"); 
    } 
} 
    
// This code is contributed by prerna saini.

# Python3 Program to Detect  
# if two integers have  
# opposite signs. 
def oppositeSigns(x, y): 
    return ((x ^ y) < 0); 
    
x = 100
y = 1
    
if (oppositeSigns(x, y) == True): 
    print ("Signs are opposite")
else: 
    print ("Signs are not opposite")
    
# This article is contributed by Prerna Saini.

// C# Program to Detect  
// if two integers have  
// opposite signs. 
using System; 
    
class GFG { 
    
    // Function to detect signs 
    static bool oppositeSigns(int x, int y) 
    { 
        return ((x ^ y) < 0); 
    } 
        
    // Driver Code 
    public static void Main() 
    { 
        int x = 100, y = -100; 
        if (oppositeSigns(x, y) == true) 
            Console.Write("Signs are opposite"); 
        else
            Console.Write("Signs are not opposite"); 
    } 
} 
    
// This code is contributed by Nitin Mittal.

<?php
// PHP Program to Detect if two 
// integers have opposite signs.
  
function oppositeSigns($x, $y)
{
    return (($x ^ $y) < 0);
}
  
    // Driver Code
    $x = 100;
    $y = -100;
    if (oppositeSigns($x, $y) == true)
    echo ("Signs are opposite");
    else
    echo ("Signs are not opposite");
      
// This code is contributed by vt_m. 
?>

<script>
  
// Javascript Program to Detect  
// if two integers have opposite signs.
  
function oppositeSigns(x, y)
    {
        return ((x ^ y) < 0);
    }
  
// Driver Code
  
    let x = 100, y = -100;
    if (oppositeSigns(x, y) == true)
         document.write("Signs are opposite");
    else
         document.write("Signs are not opposite");
  
</script>

bool oppositeSigns(int x, int y)
{
    return (x < 0)? (y >= 0): (y < 0);
}

//C program to detect whether two integers
//have different sign or not
  
#include <stdio.h>
#include<stdbool.h>
  
bool oppositeSigns(int x, int y)
{
    return (x < 0)? (y >= 0): (y < 0);
}
  
//this code is contributed by shruti456rawal

class GFG{
static boolean oppositeSigns(int x, int y)
{
    return (x < 0)? (y >= 0): (y < 0);
}
}
  
// This code contributed by umadevi9616 

def oppositeSigns(x, y):
  
    return (y >= 0) if (x < 0) else (y < 0);
  
# This code is contributed by shivanisingjss2110

using System;
class GFG{
static boo oppositeSigns(int x, int y)
{
    return (x < 0)? (y >= 0): (y < 0);
}
}
  
// This code contributed by shivanisinghss2110 

<script>
function oppositeSigns(x, y)
{
    return (x < 0)? (y >= 0): (y < 0);
}
  
  
// This code contributed by shivanisinghss2110 
</script>

bool oppositeSigns(int x, int y)
{
    return ((x ^ y) >> 31);
}

//C program to detect whether two integers
//have different sign or not
  
#include <stdio.h>
#include<stdbool.h>
  
bool oppositeSigns(int x, int y)
{
    return ((x ^ y) >> 31);
}
  
//this code is contributed by shruti456rawal

import java.io.*;
  
class GFG {
static boolean oppositeSigns(int x, int y)
{
    return ((x ^ y) >> 31);
}
   
    }
  
// This code is contributed by shivanisinghss2110

def oppositeSigns(x, y):
  
    return ((x ^ y) >> 31)
    
# this code is contributed by shivanisinghss2110

using System;
  
class GFG {
static bool oppositeSigns(int x, int y)
{
    return ((x ^ y) >> 31);
}
   
    }
  
// This code is contributed by shivanisinghss2110

<script>
function oppositeSigns(x, y)
{
    return ((x ^ y) >> 31);
}
   
  
// This code is contributed by shivanisinghss2110
</script>

// C++ Program to detect if two integers have opposite
// signs.
#include <iostream>
using namespace std;
  
bool oppositeSigns(int x, int y)
{
    long long product = 1ll * x * y;
    return (product < 0);
}
  
int main()
{
    int x = 100, y = -100;
    if (oppositeSigns(x, y) == true)
        cout << "Signs are opposite";
    else
        cout << "Signs are not opposite";
    return 0;
}
  
// This code is contributed by Aditya Kumar (adityakumar129)

// C Program to detect
// if two integers have opposite signs.
#include <stdbool.h>
#include <stdio.h>
  
bool oppositeSigns(int x, int y)
{
    long long product = 1ll * x * y;
    return (product < 0);
}
  
int main()
{
    int x = 100, y = -100;
    if (oppositeSigns(x, y) == true)
        printf("Signs are opposite");
    else
        printf("Signs are not opposite");
    return 0;
}
  
// This code is contributed by Aditya Kumar (adityakumar129)

// Java program for the above approach
import java.util.*;
  
class GFG {
  
  static boolean oppositeSigns(int x, int y)
  {
    long product = 1*x*y;
    return (product<0);
  }
  
  // Driver Code
  public static void main(String[] args)
  {
    int x = 100, y = -100;
    if (oppositeSigns(x, y) == true)
      System.out.print( "Signs are opposite");
    else
      System.out.print("Signs are not opposite");
  }
}
  
// This code is contributed by sanjoy_62.

# Python Program to detect
# if two integers have opposite signs.
  
def oppositeSigns(x,y):
    product = x*y
    return (product<0)
  
# driver code
x = 100
y = -100
if(oppositeSigns(x, y) == True):
  print("Signs are opposite")  
else :
  print("Signs are not opposite")
    
# this code is contributed by shinjanpatra

// C# program for the above approach
using System;
class GFG{
  
  static bool oppositeSigns(int x, int y)
  {
    long product = 1*x*y;
    return (product<0);
  }
  
// Driver Code
public static void Main(String[] args)
{
    int x = 100, y = -100;
    if (oppositeSigns(x, y) == true)
      Console.WriteLine( "Signs are opposite");
    else
      Console.WriteLine("Signs are not opposite");
}
}
  
// This code is contributed by avijitmondal1998.

// JavaScript Program to detect
// if two integers have opposite signs.
  
function oppositeSigns(x,y)
{
    const product = Number(x)*Number(y);
    return (product<0);
}
  
// driver code
let x = 100, y = -100;
if(oppositeSigns(x, y) == true)
{
    console.log("Signs are opposite");
}
else console.log("Signs are not opposite");
    
// this code is contributed by shinjanpatra