using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace _004
{
class Program
{
static void Main(string[] args)
{
#region //读取用户输入
//string str = Console.ReadLine(); //读取用户输入的信息,回车结束,读取的是一行,我们可以直接用来给string 变量赋值,不可以定义其他类型的变量
//Console.WriteLine("用户输入的是:" + str);
//string num1 = Console.ReadLine();
//int _num1 = Convert.ToInt32(num1);//Convert 类里面有一些转换的方法,我们可以使用 用来转换数据类型,ToInt32是转换为int类型
//string num2 = Console.ReadLine();
//double _num2 = Convert.ToDouble(num2); //Todouble是将字符串转换为double类型
//Console.WriteLine("用户输入的是:" + num2+",它的平方是 "+(_num2*_num2));
//Console.ReadKey();
#endregion
#region//练习1:让用户输入三个数,打印三个数的积
//string num1 = Console.ReadLine();
//double _num1 = Convert.ToDouble(num1);
//string num2 = Console.ReadLine();
//double _num2 = Convert.ToDouble(num2);
//string num3 = Console.ReadLine();
//double _num3 = Convert.ToDouble(num3);
//Console.WriteLine("三个数的积是:" + (_num1 * _num2 * _num3));
#endregion
#region//练习2:计算半径为3的圆的半径和面积,并打印出来
double r = 3.0;
double Pi = Math.PI;
double c = 2 * r * Pi;
double s = Pi * r * r;
Console.WriteLine("圆的周长为:" + c + ",圆的面积是:" + s);
#endregion
#region//练习3:某游戏商店里,绿宝石的价格为120个游戏币,血瓶的价格为35个游戏币,问买3个血瓶和2个绿宝石花费多少游戏币,情人节打8.8折之后呢?
double l = 120.0;
double x = 35.0;
double t = 3 * x + l * 2;
double z = (3 * x + l * 2) * 0.88;
Console.WriteLine("价格为:{0},情人节打8.8折后的价格为:{1}", t, z);
#endregion
#region//练习4:编程实现计算几天是几周零几天
//int day = 55;
//int w = 55 / 7;
//int d = 55 % 7;
//Console.WriteLine("{0}是{1}周零{2}天。", day, w, d);
#endregion
#region//练习5:编程实现,用户输入多少秒,然后程序转换为几天几小时几分钟几秒
string str = Console.ReadLine();
int sec = Convert.ToInt32(str);
int day = sec / (60 * 60 * 24);
int sec1 = sec % (60 * 60 * 24);
int hour = sec1 / (60 * 60);
int sec2 = sec1 % (60 * 60);
int min = sec2 / 60;
int sec3 = sec2 % 60;
Console.WriteLine("{0}秒转换为{1}天{2}小时{3}分钟{4}秒。", sec, day, hour, min, sec3);
#endregion
Console.ReadKey();
}
}
}
运算符的练习,自主完成,欢迎纠错!明天会将运算符的笔记整理发布,欢迎各位发表意见!