S1E16：拾遗 | 课后测试题及答案

yinda_peng

answer

小六御文

1

阿彬

0.10个A
1.0个B
2.?
3.?
4.

12323sd

1

W021024

去

Brick_Porter

1. #include <stdio.h>
   
2. #include <math.h>
   
3. 
   
4. void exercise0();
   
5. void exercise1();
   
6. void exercise2();
   
7. void exercise3();
   
8. 
   
9. int main()
   
10. {
    
11.     exercise0();
    
12.     exercise1();
    
13.     exercise2();
    
14.     exercise3();
    
15.     return 0;
    
16. }
    
17. 
    
18. void exercise0()
    
19. {
    
20.     int i;
    
21.     float profit_a, profit_b, principal, rate_a, rate_b;
    
22. 
    
23.     i = 0;
    
24.     profit_a = profit_b = principal = 10000;
    
25.     rate_a = 0.1;
    
26.     rate_b = 0.05;
    
27.     while (!(profit_b > profit_a))
    
28.     {
    
29.         profit_a += principal * rate_a;
    
30.         profit_b += profit_b * rate_b;
    
31.         i++;
    
32.     }
    
33.     printf("%d年后，黑夜的投资额超过小甲鱼！\n", i);
    
34.     printf("小甲鱼的投资额是：%.2f\n", profit_a);
    
35.     printf("黑夜的投资额是：%.2f\n", profit_b);
    
36. }
    
37. 
    
38. void exercise1()
    
39. {
    
40.     int year = 0, expense = 50, principal = 400;
    
41.     double rate = 0.08;
    
42.     while (principal > 0)
    
43.     {
    
44.         principal -= expense;
    
45.         principal += principal * rate;
    
46.         year++;
    
47.     }
    
48.     printf("%d年之后，小甲鱼败光了所有的家产，再次回到一贫如洗……\n", year);
    
49. }
    
50. 
    
51. void exercise2()
    
52. {
    
53.     int mark, base;
    
54.     double pi, item;
    
55. 
    
56.     mark = base = 1;
    
57.     pi = 0;
    
58.     do
    
59.     {
    
60.         item = mark / (double)base;
    
61.         pi += item;
    
62.         mark = -mark;
    
63.         base += 2;
    
64.     } while (fabs(item) > 1e-8);
    
65.     printf("pi = %.7lf\n", 4 * pi);
    
66. }
    
67. 
    
68. int bunny(int i)
    
69. {
    
70.     if (i < 3)
    
71.         return 2;
    
72.     return bunny(i - 1) + bunny(i - 2);
    
73. }
    
74. 
    
75. void exercise3()
    
76. {
    
77.     printf("%ld\n", bunny(24));
    
78. }

复制代码

18335681882

0. 100
1. 10
2.
3. ++c + ++b
4. x < 0 ? z = -x : z = x;
5.A.  if(size > 12) cost *= 1.05;else bill = cost * flag
B. if(ibex > 14) sheds = 3; else: {sheds - 3; help = 2 * sheds;}
C. do{scanf("%d",&score); count++}while(score < 0);printf("count=%d\n",count)

FGNHBH

。

dogdoggodlike

2333

bianhua_j

1

MuxiAcio

T.T

二拾三

晚风拾夕

答案

Yvonne-

1

裤头哥

qweqweqweqweqwe

liunian233

lz11115

16

杰Sunny

0. 100次
1. 11次
2. a
3. a = 14, b = 3, c = 9
4. z = x > 0 ? x:(-x)

Dengsanshou

P16：拾遗
3.
#include <stdio.h>
#include <math.h>
int main()
{
        int n;//months
        int pair;//the number of rabits
        int i;
        int n1;
        int n2;
        printf("请输入繁殖月数：");
        scanf_s("%d", &n);
        if (n <= 2)
        {
                pair = 1;
                n1 = 1;
                n2 = 1;
        }
        n1 = 1;
        n2 = 1;
        for (i = 3; i <= n; i++)
        {
                pair = n1 + n2;
                n1 = n2;
                n2 = pair;
               
        }
        printf("%d月后，兔子的总对数为：%d\n", n, pair);
        return 0;
}