limits.cpp

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#include <iostream>
#include <limits>
#include <typeinfo>
#include <iomanip>
using namespace std;

// print class-specific limits using numeric_limits from <limits>

template <class Type>
void printLimits(const Type& t)
// post: print max,min values and # bits used by t
{
    cout << "\ninformation for " << typeid(t).name() << endl;
    cout << "min =\t"  << numeric_limits<Type>::min()  << endl;
    cout << "max =\t"  << numeric_limits<Type>::max()  << endl;
    cout << "#bits=\t" << numeric_limits<Type>::digits << endl;
    cout << "is integral? " 
         << boolalpha << numeric_limits<Type>::is_integer << endl;
}

int main()
{

    printLimits(0);
    printLimits(0u);
    printLimits(0L);
    printLimits('a');
    printLimits(static_cast<unsigned char>('a'));
    printLimits(0.0);
    printLimits(static_cast<float>(0.0));
    return 0;
}