Eclips中运行结果与终端不一致

最新推荐文章于 2023-03-28 15:58:42 发布

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原文链接：http://www.cnblogs.com/liuyazhou/archive/2010/05/07/1729893.html

文章标签：

#开发工具 #java #操作系统

本文探讨了在Eclipse和终端中运行同一段C程序时出现的不同结果，并提供了具体的代码示例。作者请求帮助分析导致差异的原因。

以前在Windows下好像就有过这种经验。在Eclipse里的java程序运行结果与命令行窗口的结果不一致。而往往是命令行窗口的结果是自己期望的。最近在学习LINUX，使用的是Eclpise+CDT环境。今天学习stty命令时，又一次出现了这种怪事。把代码贴出来，大家帮我分析一下原因吧。

1 #include <stdio.h>
2 #include <termios.h>
3
4 void showbaud(int thespeed);
5 void show_some_flages(struct termios *ttyp);
6
7
8 int main()
9 {
10     struct termios ttyinfo;
11     if (tcgetattr(0,&ttyinfo)==-1) {
12         perror("cannot get params about stdin.");
13         exit(1);
14     }
15
16     showbaud(cfgetospeed(&ttyinfo));
17
18     printf("the erase character is ascii %d, Ctrl - %c\n",
19         ttyinfo.c_cc[VERASE],ttyinfo.c_cc[VERASE]-1+'A');
20     printf("the line kill character is ascii %d, Ctrl - %c\n",
21         ttyinfo.c_cc[VKILL],ttyinfo.c_cc[VKILL]-1+'A');
22
23     show_some_flages(&ttyinfo);
24
25     return 1;
26
27 }
28
29 void showbaud(int thespeed)
30 {
31     printf("the baud rate is");
32     switch (thespeed) {
33         case B300:printf("300\n");break;
34         case B600:printf("600\n");break;
35         case B1200:printf("1200\n");break;
36         case B1800:printf("1800\n");break;
37         case B2400:printf("2400\n");break;
38         case B4800:printf("4800\n");break;
39         case B9600:printf("9600\n");break;
40         default:printf("FAST\n");
41             break;
42     }
43
44 }
45
46 struct flaginfo{int f1_value;char *f1_name;};
47
48 struct flaginfo input_flags[]={
49     IGNBRK,"Ignore break condition",
50     BRKINT,"Signal interrupt on break",
51     IGNPAR,"Ignore chars with parity errors",
52     PARMRK,"Mark parity errors",
53     INPCK,"Enable input parity check",
54     ISTRIP,"Strip character",
55     INLCR,"Map NL to CR on input",
56     IGNCR,"Ignore CR",
57     ICRNL,"Map CR to NL on input",
58     IXON,"Enable start/stop output control",
59     IXOFF,"Enable start/stop input control",
60     0,NULL
61
62 };
63
64 struct flaginfo local_flags[]={
65     ISIG,"Enable signals",
66     ICANON,"Cannonical upper/lower appearance",
67     ECHO,"Enable echo",
68     ECHOE,"Echo ERASE as BS-SPACE-BS",
69     ECHOK,"Echo KILL by starting new line",
70     0,NULL
71
72 };
73
74
75 void show_some_flages(struct termios *ttyp)
76 {
77     show_flagset(ttyp->c_iflag,input_flags);
78     show_flagset(ttyp->c_lflag,local_flags);
79 }
80
81 void show_flagset(int thevalue,struct flaginfo thebitnames[])
82 {
83     int i;
84     for (i = 0; thebitnames[i].f1_value; i++) {
85         printf("%s is ",thebitnames[i].f1_name);
86         if(thevalue & thebitnames[i].f1_value)
87             printf("ON\n");
88         else
89             printf("OFF\n");
90     }
91
92 }
93

在eclipse中，运行结果为：