循环求助。。。。

左手不坏

#include <stdio.h>
#define BEI 1.5
#define RATE_300 0.15
#define RATE_450 0.20
#define RATE 0.25
#define HOUR 40
#define JIE1 300
#define JIE2 450
int main (void)
{
int hour;
double time;
double salary,tax,wage;

printf("*********************************************************************\n");
printf("Enter the number corresponding to the desired pay rate or action:\n");
printf("1) $8.75/hr           2) $9.33/hr\n3) $10.00/hr          4) $11.20/hr\n5) quit\n");
printf("*********************************************************************\n");

printf("Please enter the number from 1 to 4: ");
   time = scanf("%d", &hour);
   while(hour!=5 && time == 1)
{
  switch(hour)
  {
  case 1: time = 8.75;
   break;
  case 2: time = 9.33;
   break;
  case 3: time = 10.00;
   break;
  case 4: time = 11.20;
   break;
  case 5: printf("quit!\n");
  scanf("%d",&hour);
   break;
  
  }


printf("Please input your time: ");
scanf("%d",&hour);

if(hour <= HOUR)
{
  salary = hour * time;
}
if(hour > HOUR)
{
  salary = HOUR * time + (hour - HOUR) * time;
}

if(salary <= JIE1)
{
  tax = salary * RATE_300;
}
else if (salary >JIE1 && salary <=JIE2)
{
  tax = JIE1 * RATE_300 + (salary - JIE1) * RATE_450;
}
else
{
  tax = JIE1 * RATE_300 + (JIE2 - JIE1) * RATE_450 + (salary - JIE2) * RATE;
}
wage = salary - tax;

   printf("工资:%.0lf     expenses of taxation:%.0lf     Net wage:%.0lf\n",salary,tax,wage);
printf("Please choose a number again:");
   scanf("%d", &hour);
}
return 0;
}
要求循环  各位同学帮忙看看吧  弄了半天了   
谢谢了

古来圣贤皆寂寞

  10                    没咋看懂，不过希望以后能和大家在鱼C里一起学习！！

睿之火影

代码太长，先说明自己所写的代码的意义，这样我们也好分析些~

牡丹花下死做鬼

请你

1. XXXX

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这种方式写代码 并且这么长的代码请加上注释方便观看 谢谢

福禄娃娃

double salary,tax,wage;这条语句下面加入一个while(1)或者for(;;)，然后用花括号将return 0之前的程序都括起来便可以让程序死循环。
switch中缺少default，别人不一定会输入5，所以程序会输出无效值。

tsembrace

你这程序不能循环的原因在于循环条件中time变了
while(hour!=5 && time == 1)--->此时你的time是scanf语句的返回值，第一次循环返回值为1；进入代码段后time又变成每小时单价了，所以在代码段最后要重设time进行循环条件判断。（我不觉得你这里time的判定条件是必要的）
其他一些细节问题：
1、变量的名称：别起得乱七八糟的，不同功能含义的变量就用不同变量去表示，别像你代码里time和hour一会儿这意思一会儿那意思
2、switch里最好加个default提示选项错误。

挺好的

有道理啊有道理

tsembrace

1. #include <stdio.h>
   
2. #define BEI 1.5
   
3. #define RATE_300 0.15
   
4. #define RATE_450 0.20
   
5. #define RATE 0.25
   
6. #define HOUR 40
   
7. #define JIE1 300
   
8. #define JIE2 450
   
9. int main (void)
   
10. {
    
11. int hour,choice;
    
12. double time;
    
13. double salary,tax,wage;
    
14. 
    
15. printf("*********************************************************************\n");
    
16. printf("Enter the number corresponding to the desired pay rate or action:\n");
    
17. printf("1) $8.75/hr 2) $9.33/hr\n3) $10.00/hr 4) $11.20/hr\n5)
    
18. 
    
19. quit\n");
    
20. printf("*********************************************************************\n");
    
21. 
    
22. printf("Please enter the number from 1 to 4:\n");
    
23. scanf("%d", &choice);
    
24. while(choice!=5)
    
25. {
    
26. switch(choice)
    
27. {
    
28. case 1: time = 8.75;
    
29. break;
    
30. case 2: time = 9.33;
    
31. break;
    
32. case 3: time = 10.00;
    
33. break;
    
34. case 4: time = 11.20;
    
35. break;
    
36. default:
    
37. printf("your choice is wrong.\n");
    
38. printf("please enter your price per time:\n");
    
39. scanf("%lf", &time);
    
40. printf("your price=%f.\n",time);
    
41. break;
    
42. 
    
43. }
    
44. 
    
45. 
    
46. printf("Please input your hours: ");
    
47. scanf("%d",&hour);
    
48. 
    
49. if(hour <= HOUR)
    
50. {
    
51. salary = hour * time;
    
52. }
    
53. if(hour > HOUR)
    
54. {
    
55. salary = HOUR * time + (hour - HOUR) * time;
    
56. }
    
57. 
    
58. if(salary <= JIE1)
    
59. {
    
60. tax = salary * RATE_300;
    
61. }
    
62. else if (salary >JIE1 && salary <=JIE2)
    
63. {
    
64. tax = JIE1 * RATE_300 + (salary - JIE1) * RATE_450;
    
65. }
    
66. else
    
67. {
    
68. tax = JIE1 * RATE_300 + (JIE2 - JIE1) * RATE_450 + (salary - JIE2) * RATE;
    
69. }
    
70. wage = salary - tax;
    
71. 
    
72. printf("salary:%.0lf expenses of taxation:%.0lf Net
    
73. 
    
74. wage:%.0lf\n",salary,tax,wage);
    
75. printf("Please choose a number again:");
    
76. scanf("%d", &choice);
    
77. }
    
78. return 0;
    
79. }
    

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