Истина/Ложь

#include <iostream>
#include <clocale>
int main(){
    setlocale(LC_ALL,"Russian");
    int a,b[5];
    std::cin >> a;
    for (int i=1; a;a/=10)
        b[i++]=a%10;
    std::cout << ( (b[1]!=b[2] and b[1]!=b[3] and b[1]!=b[4] and b[2]!=b[3] and b[2]!=b[4] and b[3]!=b[4])? "Истина" : "Ложь");
    
    return 0;
}

#include <iostream>
#include <set>
 
int main()
{
    int number = 1232;
    std::set < int > SetOfNumbers;
    int number0 = number;
    
    while ( number0 != 0 )
    {
        SetOfNumbers.insert ( number0 % 10 );
        number0 /= 10;
    }
 
    std::cout << ( SetOfNumbers.size() == 4 ) << std::endl;
 
    std::cin.get();
    return 0;
}

#include <iostream>
#include <string>
#include <set>
 
int main()
{
    std::set < char > SetOfNumbers;
    std::string Number = "12342643509342349814";
 
    for ( int index = 0; index < Number.length(); index++ )
        SetOfNumbers.insert ( Number [ index ] );
 
    std::cout << ( SetOfNumbers.size() == Number.length() ) << std::endl;
 
    std::cin.get();
    return 0;
}

#include <iostream>
#include <conio.h>
 
using namespace std;
 
int main()
{
    int *b = new int[4];
    int w, i=-1;
    
    cout << "Enter w: ";
    cin  >> w;
    
    while (w>0)
    {
       b[++i] = w % 10;
       w /= 10;           
    }
    
    bool f = (*b==b[1] || b[1]==b[2] || b[2]==b[3] || b[3]==*b || b[1]==b[3] || *b==b[3]);
    delete[] b;
    
    cout << (f ? "True":"False");
    getch();
    return 0;
}