Материал из C\C++ эксперт
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cout: dec
#include <iostream.h>
#include <iomanip.H>
main(void)
{
long n = 10000;
cout << dec << n << endl;
return 0;
}10000
cout: hex
#include <iostream.h>
#include <iomanip.H>
main(void)
{
long n = 10000;
cout << hex << n ;
return 0;
}2710"
cout: oct
#include <iostream.h>
#include <iomanip.H>
main(void)
{
long n = 10000;
cout << oct << n ;
return 0;
}23420"
To output in hexadecimal
#include <iostream>
using namespace std;
int main()
{
cout.setf(ios::hex, ios::basefield);
cout << 100; // this displays 64
return 0;
}Using hex, oct, dec and setbase stream manipulators.
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
int n;
cout << "Enter a decimal number: ";
cin >> n;
cout << n << " in hexadecimal is: "
<< hex << n << "\n"
<< dec << n << " in octal is: "
<< oct << n << "\n"
<< setbase( 10 ) << n << " in decimal is: "
<< n << endl;
return 0;
}
