前几天面试遇到这个问题:在Java中如何将字符串转化为整数,当时too young too naive,随便回答了一下.今天跑去看Java源码中paresInt函数的写法,Oh my god!其实不看也能写出来,但是我觉得源码中的实现更好.下面贴出源码顺道分析一下: /* @param s the {@code String} containing the integer * representation to be parsed * @param radix the radix to be u
mysql 将指定列的浮点数转化为整数: update A set B = cast(B as decimal(10,0)) -- 或者 update A set B = round(B,0) 例如:update hdcloude01.t_a01_eltable set t_a01_eltable.BatteryDal = round(t_a01_eltable.BatteryDal, 0) where t_a01_eltable.`BatteryDal` is not null;
Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 罗马数转化成数字问题,我们需要对于罗马数字很熟悉才能完成转换.以下截自百度百科: 罗马数字是最早的数字表示方式,比阿拉伯数字早2000多年,起源于罗马. 如今我们最常见的罗马数字就是钟表的表盘符号:Ⅰ,Ⅱ,Ⅲ,Ⅳ(IIII),Ⅴ,Ⅵ,Ⅶ,Ⅷ,Ⅸ,Ⅹ,Ⅺ,Ⅻ…… 对应阿拉伯数字(就是现
使用内建函数raw_input()内建函数,它读取标准输入,并将读取到的数据赋值给指定的变量.我们可以使用int()内建函数将用户输入的字符串转换为整数: >>> user = raw_input("Enter login name:") Enter login name: root >>> print "Your Login is:", user Your Login is: root 上面这个例子只能用于文本输入,下面输入一
Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 10 L 50 C 100 D 500 M 1000 For example, two is written as II in Roman numeral, just two one's added together. Twelve is written as, XII, which i
链接:http://codeforces.com/contest/1082 A. Vasya and Book 题意: n,x,y,d 一本电子书有n页,每一次翻动只能往前或者往后翻d页.求x->y页最少需要多少步.只能在(1~n)之间翻.具体细节看题目吧.博客仅作记录 int t,n,x,y,d; int calc(int x,int y) { return abs(x-y)/d; } int main() { scanf("%d",&t); while(t--) {
题目:输入两个正整数m和n,求其最大公约数和最小公倍数. 程序分析:利用辗除法. package Studytest; import java.util.Scanner; public class Prog6 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("请输入第一个数"); int n = sc.nextInt(); System.
Given a roman numeral, convert it to an integer. The answer is guaranteed to be within the range from 1 to 3999. Have you met this question in a real interview? Yes Clarification What is Roman Numeral? https://en.wikipedia.org/wiki/Roman_numerals htt