请老师们帮我解决一个问题，编程里面的

1. extern int shoudan=1;
   
2. extern double shoushu=0.01;
   
3. extern int Szhiyin=40;
   
4. extern int jiacang=40;
   
5. extern int beishu=2;
   
6. extern int cishu=8;
   
7. extern int zhisun=20;
   
8. int a,chicangdan,kaicang;
   
9. 
   
10. //+------------------------------------------------------------------+
    
11. //| expert initialization function |
    
12. //+------------------------------------------------------------------+
    
13. int init()
    
14. {
    
15. //----
    
16. 
    
17. //----
    
18. return(0);
    
19. }
    
20. //+------------------------------------------------------------------+
    
21. //| expert deinitialization function |
    
22. //+------------------------------------------------------------------+
    
23. int deinit()
    
24. {
    
25. //----
    
26. 
    
27. //----
    
28. return(0);
    
29. }
    
30. //+------------------------------------------------------------------+
    
31. //| expert start function |
    
32. //+------------------------------------------------------------------+
    
33. int start()
    
34. {
    
35. //----
    
36. if(Bars<100)
    
37. {
    
38. Print("bars less than 100");
    
39. return(0);
    
40. }
    
41. Print("持仓单方向1为买，2为卖：",TheLastOrderType());
    
42. chicangdan=GetHoldingOrderCnt();
    
43. if(chicangdan<1)
    
44. {
    
45. if(TheLastOrderType()==-1)
    
46. {
    
47. if(shoudan==1)
    
48. {
    
49. 
    
50. mairu();
    
51. Print("测试111");
    
52. 
    
53. }
    
54. if(shoudan==2)
    
55. {
    
56. 
    
57. Print("测试222");
    
58. 
    
59. }
    
60. }
    
61. if(TheLastOrderType()==0)
    
62. {
    
63. 
    
64. Print("测试11");
    
65. 
    
66. }
    
67. if(TheLastOrderType()==1)
    
68. {
    
69. 
    
70. Print("测试22");
    
71. return(0);
    
72. }
    
73. }
    
74. //----
    
75. return(0);
    
76. }
    
77. //+------------------------------------------------------------------+
    
78. int TheLastOrderType()//返回最后历史单的方向 如果返回-1表示没有持仓
    
79. {
    
80. int P=-1;
    
81. for(int i=OrdersTotal()-1;i>=0;i--)
    
82. {
    
83. OrderSelect(i, SELECT_BY_POS, MODE_HISTORY);
    
84. if(OrderSymbol()==Symbol() && OrderMagicNumber()==123 )
    
85. {
    
86. P=OrderType();
    
87. break;
    
88. }
    
89. }
    
90. return(P);
    
91. }
    
92. 
    
93. //+------------------------------------------------------------------+
    
94. int GetHoldingOrderCnt()
    
95. {
    
96. int j=0;
    
97. for(int i=0;i<OrdersTotal();i++)
    
98. {
    
99. OrderSelect(i, SELECT_BY_POS, MODE_TRADES);
    
100. if(OrderSymbol()==Symbol() )
     
101. {
     
102. j=j+1;
     
103. }
     
104. }
     
105. return(j);
     
106. }
     
107. 
     
108. void mairu()
     
109. {
     
110. kaicang=OrderSend(Symbol(),OP_BUY,shoushu,Ask,3,Ask-500*Point,Ask+Szhiyin*Point,"My order #2",123,0,Lime);
     
111. }
     
112. 
     
113. void maichu()
     
114. {
     
115. kaicang=OrderSend(Symbol(),OP_SELL,shoushu,Bid,3,Bid+500*Point,Bid-Szhiyin*Point,"My order #2",123,0,Magenta);
     
116. }

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