problem with the number

[DANNY123]

#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
int a,b,c,d,n,m;
cout<<"a,b,c,d:";
cin>>a,b,c,d;
n=a*1000+b*100+c*10+d;
cin>>n;
m=d*1000+c*100+b*10+a;
cout<<"n="<<n<<endl;
cout<<"m="<<m<<endl;


system("PAUSE");
return EXIT_SUCCESS;
}
//I need to print the two number, but indeed it shows me that n=230580640,m=2295783, why?

[DANNY123]

I type the 1223.

[Chervil]

cin>>a,b,c,d;
should be
cin >> a >> b >> c >> d;

The reason for the incorrect result is the other variables were not initialised and so had whatever random value happened to be in that memory location.

#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int a,b,c,d,n,m;

    cout << "a,b,c,d: ";
    cin >> a >> b >> c >> d;

    n = a*1000 + b*100 + c*10 + d;

    m = d*1000 + c*100 + b*10 + a;

    cout << "n=" << n << endl;
    cout << "m=" << m << endl;

    return 0;
}

[vlad from moscow]

Apart from the previous comment I think that you was going to enter digits not some numbers. In this case it would be better to use an object of type char to store an entered digit. Something as for example

char c;

do
{
   std::cin >> digit;
} while ( isdigit( c ) );