floatlimits.cpp

来自「C++ sample code, for the book: C++ blac」· C++ 代码 · 共 35 行

#include <iostream>
#include <cfloat>    
using namespace std;

int main()
{
    cout << "The float type is " << sizeof (float) << " bytes long" << endl;
    cout << "The double type is " << sizeof (double) << " bytes long" << endl;
    cout << "The long double type is " << sizeof (long double) << " bytes long" << endl;
    cout << endl;

    cout << "Minimum float value: " << FLT_MIN << endl;        
    cout << "Maximum float value: " << FLT_MAX << endl;        
    cout << "Number of mantissa digits: " << FLT_MANT_DIG << endl;        
    cout << "Maximum exponent for decimal numbers: " << FLT_MAX_10_EXP << endl;        
    cout << "Minimum exponent for decimal numbers: " << FLT_MIN_10_EXP << endl;        
    cout << endl;

    cout << "Minimum double value: " << DBL_MIN << endl;        
    cout << "Maximum double value: " << DBL_MAX << endl;        
    cout << "Number of mantissa digits: " << DBL_MANT_DIG << endl;        
    cout << "Maximum exponent for decimal numbers: " << DBL_MAX_10_EXP << endl;        
    cout << "Minimum exponent for decimal numbers: " << DBL_MIN_10_EXP << endl;        
    cout << endl;

    cout << "Minimum long double value: " << LDBL_MIN << endl;        
    cout << "Maximum long double value: " << LDBL_MAX << endl;        
    cout << "Number of mantissa digits: " << LDBL_MANT_DIG << endl;        
    cout << "Maximum exponent for decimal numbers: " << LDBL_MAX_10_EXP << endl;        
    cout << "Minimum exponent for decimal numbers: " << LDBL_MIN_10_EXP << endl;        
    cout << endl;

    return 0;
}