练手

 1             Console.Write("请输入第一个数:");
 2             string a = Console.ReadLine();
 3             int a1 = Convert.ToInt16(a);
 4             
 5             Console.Write("请输入第二个数:");
 6             string b = Console.ReadLine();
 7             int b1 = Convert.ToInt16(b);
 8             
 9             Console.Write("请输入+/-");
10             string c = Console.ReadLine();
11 
12             int x1 = a1 + b1;
13             int y1 = a1 - b1;
14             string x = Convert.ToString(x1);
15             string y = Convert.ToString(y1);
16             
17             
18             
19             string jia=(c=="+")?x:y;
20             Console.Write(jia);
21             
22 
23             Console.ReadLine();
1             Console.Write("请输入一个0~100的整数:");
2             string a1 = Console.ReadLine();
3             int a = Convert.ToInt16(a1);
4             string b = a < 50 || a == 66 ? "" : "";
5             Console.Write(b);
6 
7 
8 
9             Console.ReadLine();
1             Console.Write("请输入您的成绩(0~100):");
2             string a = Console.ReadLine();
3             double a1 = Convert.ToDouble(a);
4 
5             string b = a1 >= 60 ? "及格了!" : "不及格,继续努力!";
6             Console.Write(b);
7 
8             Console.ReadLine();
 1             Console.Write("请输入一个100内的整数:");
 2             string a = Console.ReadLine();
 3             int b = (int.Parse(a)) % 7;
 4             string c = b == 0 ? "" : "不是";
 5             int a1 = (int.Parse(a));
 6             string d = a1 >= 70 && a1 < 80 ? "" : "不是";
 7             int a2 = (int.Parse(a));
 8             int b1 = (int.Parse(a)) % 10;
 9             string e = b1 == 7 ? "" : "不是";
10 
11 
12             Console.WriteLine(""+"是不是7的倍数:"+c+"");
13             Console.WriteLine(""+"十位数是不是7:"+d+"");
14             Console.WriteLine(""+"个位数是不是7:"+e+"");
15 
16           
17             
18             Console.ReadLine();
19         }

 下面这个是上面第一个的简化版  也是思路最清晰的一种方法

 1             Console.Write("请输入第一个数:");
 2             double a = Convert.ToDouble(Console.ReadLine());
 3 
 4 
 5             Console.Write("请输入第二个数:");
 6             double b = Convert.ToDouble(Console.ReadLine());
 7 
 8 
 9             Console.Write("请输入字符(+/-)");
10             char c = Convert.ToChar(Console.ReadLine());
11             char c1 = '+';
12 
13 
14             double d = c == c1 ? a + b : a - b;
15             Console.WriteLine(d);
16             Console.ReadLine();

 下面这个是上面第二个练习小题的另一种思路,核心思路不一样,但是套路相同

1             Console.Write("请输入一个0~100的整数:");
2             string a1 = Console.ReadLine();
3             int a = Convert.ToInt16(a1);
4             string b = a >= 50 && a != 66 ? "" : "";
5             Console.Write(b);
6 
7 
8 
9             Console.ReadLine();

 

posted @ 2017-02-20 14:52  Jokerpapapa  阅读(149)  评论(0编辑  收藏  举报