numeric_limits.cpp

numeric_limits.cpp

//
//  limits.cpp
//  CplusplusPractice
//
//  Created by masai on 2015/05/19.
//  Copyright (c) 2015年 masai. All rights reserved.
//

#include <iostream>
#include <limits>

typedef long HashValueLong;

typedef unsigned long HashValueULong;

int main() {

    // マクロ定義による取得
    std::cout << "int max: " << INT_MAX << std::endl;
    std::cout << "int min: " << INT_MIN << std::endl;
    
    // クラステンプレートによる取得
    std::cout << "int max: " << std::numeric_limits<int>::max() << std::endl;   //2147483647
    std::cout << "long max: " << std::numeric_limits<long>::max() << std::endl; //2147483647
    std::cout << "long min: " << std::numeric_limits<long>::min() << std::endl;
    std::cout << "long lowest: " << std::numeric_limits<long>::lowest() << std::endl;

    std::cout << "double max: " << std::numeric_limits<double>::max() << std::endl;
    std::cout << "double min: " << std::numeric_limits<double>::min() << std::endl;
    std::cout << "double lowest: " << std::numeric_limits<double>::lowest() << std::endl;

    // 型に依存しない書き方
    std::cout << "HashValue(long): " << std::numeric_limits<HashValueLong>::max() << std::endl;
    std::cout << "HashValue(unsigned long): " << std::numeric_limits<HashValueULong>::max() << std::endl;
    
    return 0;
}