if条件语句练习题

 static void Main(string[] args)
        { 
        //做一个算缘分的小游戏：
           //输入男方姓名，女方姓名，输出缘分指数，给出建议。
            Console.WriteLine("男方姓名：");
            string nan = Console.ReadLine();
            Console.WriteLine("女方姓名：");
            string nv = Console.ReadLine();
            Random r = new Random();
            int n = r.Next(100);
            string jianyi = "";
            if (n>0&&n<30)
            {
                jianyi="有缘无分，分手吧";
            }
            else if (n>=30&&n<60)
            {
                jianyi="一起努力吧！";
            }
            else if (n>=60&&n<80)
            {
               jianyi="幸福一对";
            }
            else
            {
                jianyi="佳偶天成，珠联璧合";
            }
            Console.WriteLine("{0}和{1}的缘分指数是：{2}。建议：{3}",nan,nv,n,jianyi);
        }

 1   static void Main(string[] args)
 2         {
 3             //相亲
 4             string fangzi, piaozi, nengli;
 5             Console.Write("女神：有房子吗？");
 6             fangzi = Console.ReadLine();
 7             if (fangzi == "有")
 8             {
 9                 Console.WriteLine("女神：咱们结婚吧");
10             }
11             else
12             {
13                 Console.Write("女神：有钱吗？");
14                 piaozi = Console.ReadLine();
15                 if (piaozi=="有")
16                 {
17                     Console.WriteLine("女神：用钱买房子结婚吧");
18                 }
19                 else
20                 {
21                     Console.Write("女神：有能力吗？");
22                     nengli = Console.ReadLine();
23                     if (nengli=="有")
24                     {
25                         Console.WriteLine("女神：赶紧赚钱，买房子，结婚吧");
26                     }
27                     else
28                     {
29                         Console.WriteLine("女神：拜拜");
30                     }
31 
32                 }
33    
34             }
35      
36         }

 1  static void Main(string[] args)
 2         { 
 3         //做梦醒了，看看时间，是否起床
 4             int  shijian, xingqi;
 5             Console.WriteLine("几点了？");
 6             shijian = Convert.ToInt32(Console.ReadLine());
 7             if (shijian<8)
 8             {
 9                 Console.WriteLine("还早呢，再睡会");
10             }
11             else
12             {
13                 Console.WriteLine("今天星期几？");
14                 xingqi = Convert.ToInt32(Console.ReadLine());
15                 if (xingqi==2||xingqi==5)
16                 {
17                     Console.WriteLine("不上课，接着睡");
18                 }
19                 else
20                 {
21                     Console.WriteLine("赶紧起床，不然要迟到了");
22                 }
23             }
24         }

 1 static void Main5555(string[] args)
 2         
 3 { 
 4         //计算机生成100以内的3个数，输入5个数，输出中奖
 5             //颜色显示
 6             Console.ForegroundColor = ConsoleColor.DarkYellow;
 7 
 8             int caiduigeshu = 0;
 9 
10             //计算机随机输出
11             Random random = new Random();
12             int a = random.Next(100);
13             int b= random.Next(100);
14             int c = random.Next(100);
15 
16             //人类输入
17             Console.WriteLine("*************请输入5个100以内的数：****************");
18             Console.WriteLine("第一个数是：");
19             int x1 = Convert.ToInt32(Console.ReadLine());
20             Console.WriteLine("第二个数是：");
21             int x2 = Convert.ToInt32(Console.ReadLine());
22             Console.WriteLine("第三个数是：");
23             int x3 = Convert.ToInt32(Console.ReadLine());
24             Console.WriteLine("第四个数是：");
25             int x4 = Convert.ToInt32(Console.ReadLine());
26             Console.WriteLine("第五个数是：");
27             int x5 = Convert.ToInt32(Console.ReadLine());
28             //清屏
29             Console.Clear();
30             Console.WriteLine("电脑随机生成的数是:{0},{1},{2}",a,b,c);
31 
32             //运算输出
33             if (a==x1||b==x1||c==x1)
34             {
35                 caiduigeshu++;
36                 
37             }
38             if (a == x2 || b == x2 || c == x2)
39             {
40                 caiduigeshu++;
41             }
42             if (a == x3 || b == x3 || c == x3)
43             {
44                 caiduigeshu++;
45             }
46             if (a == x4 || b == x4 || c == x4)
47             {
48                 caiduigeshu++;
49             }
50             if (a == x5 || b == x5 || c == x5)
51             {
52                 caiduigeshu++;
53             }
54 
55             if (caiduigeshu==0)
56             {
57                 Console.WriteLine("谢谢参与"); 
58             }
59             else if (caiduigeshu==1)
60             {
61                 
62                 Console.WriteLine("恭喜你中了10元"); 
63             }
64             else if (caiduigeshu==2)
65             {
66                 Console.WriteLine("恭喜你中了100元");
67             }
68             else if (caiduigeshu==3)
69             {
70                 Console.WriteLine("恭喜你中了1000元");
71             }
72             else
73             {
74                 Console.WriteLine("恭喜你中了100万");
75             }
76 
77         }

 1  static void Main(string[] args)
 2         { 
 3         //作业：输入应发工资，输出所交税费和税后工资
 4 
 5             double yfgz, shuifei, shgz;
 6             double m1 = 0.03, k1 = 0;
 7             double m2 = 0.1, k2 = 105;
 8             double m3 = 0.2, k3 = 555;
 9             double m4 = 0.25, k4 =1005;
10             double m5 = 0.3, k5 = 2755;
11             double m6 = 0.35, k6 = 5505;
12             double m7 = 0.45, k7 = 13505;
13 
14             //输入
15             Console.WriteLine("请输入应发工资：");
16             yfgz = Convert.ToDouble(Console.ReadLine());
17             double s=yfgz-3500;   //
18 
19            
20 
21             //运算
22             if (yfgz<=3500)
23             {  
24                 shuifei = 0;
25                 shgz = yfgz;
26                 Console.WriteLine("不用交税\n税后工资是："+shgz);
27                 Console.WriteLine("应交税费是：" + shuifei);
28             }
29             else
30             {
31                 if (s>0&&s<=1500)
32                 {
33                     shuifei = s*m1-k1;
34                     shgz = yfgz-shuifei;
35                     Console.WriteLine("税后工资是："+shgz);
36                    Console.WriteLine("应交税费是：" + shuifei);
37                 }
38                 else if (s>1500&&s<=4500)
39                 {
40                     shuifei = s * m2 - k2;
41                     shgz = yfgz - shuifei;
42                     Console.WriteLine("税后工资是：" + shgz);
43                     Console.WriteLine("应交税费是：" + shuifei);
44                 }
45                 else if (s > 4500 && s <= 9000)
46                 {
47                     shuifei = s * m3 - k3;
48                     shgz = yfgz - shuifei;
49                     Console.WriteLine("税后工资是：" + shgz);
50                     Console.WriteLine("应交税费是：" + shuifei);
51                 }
52                 else if (s > 9000 && s <= 35000)
53                 {
54                     shuifei = s * m4 - k4;
55                     shgz = yfgz - shuifei;
56                     Console.WriteLine("税后工资是：" + shgz);
57                     Console.WriteLine("应交税费是：" + shuifei);
58                 }
59                 else if (s > 35000 && s <= 55000)
60                 {
61                     shuifei = s * m5 - k5;
62                     shgz = yfgz - shuifei;
63                     Console.WriteLine("税后工资是：" + shgz);
64                     Console.WriteLine("应交税费是：" + shuifei);
65                 }
66                 else if (s > 55000 && s<=80000)
67                 {
68                     shuifei = s * m6 - k6;
69                     shgz = yfgz - shuifei;
70                     Console.WriteLine("税后工资是：" + shgz);
71                     Console.WriteLine("应交税费是：" + shuifei);
72                 }
73                 else
74                 {
75                     shuifei = s * m7 - k7;
76                     shgz = yfgz - shuifei;
77                     Console.WriteLine("税后工资是：" + shgz);
78                     Console.WriteLine("应交税费是：" + shuifei);
79                 }
80             }
81         }