我正在制作一个程序来构建二进制消息。我使用char字符串来保存二进制值。所以我已经初始化了一堆具有默认值的char字符串。然后我通过运行for循环将它们结合起来,并将它们读入一个大字符串(aismsg/ais_packet)中。并且一切正常,直到我添加msg14Text [],然后我建立的字符串(aismsg/ais_packet)被缩短,如下所示(即使我没有使用变量)。看起来像我添加msg14Text []时,它改变了其他字符串之一的值。这可能是内存分配问题吗?代码的字符串覆盖其他字符串
部分:
char ais_packet[257]; //Allokerer array for ais data pakke.
char aismsg[175]; //Allokerer array for meldingen.
int burst_nr = 1; //Indicates with burst it is transmittin (1-7).
char ramp_up[] = "00000000"; //Ramp up buffer.
char train_seq[] = "010101010101010101010101"; //Training sequence 24 bits of alternating 0-1.s
char hdlc_flag[] = "01111110"; //HDLC Start and END flag.
char buffer[] = "000000000000000000000000"; //Data packet buffer.
char msgID1[] = "000001"; //msg. 1.
char msgID14[] ="010100"; //msg. 14.
char repeat[] = "00"; //repetert 0 ganger.
char mmsi[] = "000111010110111100110100010101"; //Gir 123456789 som MMSI.
char nav_stat[] = "1111"; //Gir 15= AIS-SART test, endres til 14 (1110) for aktiv AIS-SART.x'
char rot[] = "10000000"; //Rate of Turn -128 betyr ikkje tilgjengelig.
char sogBin[] = "1111111111"; //Tilsvarer 1023 = not available = default.
char pos_acc[] = "0"; //Posisjonsnøyaktighet over 10m. 1 = under 10m.
char lonBin[] = "0110011110010001101011000000"; // Tilsvarer 181 grader som er default verdi for Longitude.
char latBin[] = "011010000010010000101000000"; // Tilsvarer 91 grader som er default verdi for Latitude.
char cogBin[] = "111000010000"; //Tilsvarer 3600 = not available = default.
char headingBin[] = "111111111"; //511 = not available = default
char timestamp[] = "111100"; //Tid siden melding er generert, 60 = default = ts not available.
char spec_man[] = "01"; //Special manouver 0 = default, 1 = not engaged in special manouver
char spare[] = "000";
char spareMSG14[] = "00"; //Reserved.
char raim[] = "0"; //RAIM 0 = not in use.
char comm_state[] = "00011100000000000000"; // First 2bit: Sync state: 3 = no UTC sync = default, 0 = UTC sync. 0011100000000000000
char msg14Text[] = "100100101101111011111100"; //CAUSING TROUBLE!!!! for AIS melding 14 står "Test" med 6-bit ASCII koding.
该函数的enitre代码可以在pastebin.com/wj0RxyLX
输出AIS的分组中找到与msg14Text []:
00000000
AIS的输出没有msg14Text []的数据包:
0000000001010101010101010101010101111110000001000001110101101111001101000101011111100000000011010000000000000110100011000101111000000101100100000100001100101110000100000000110011111000100000011100000000000000001000100110100101111110000000000000000000000000
aispacket应包括以下变量:
ramp_up[] + train_seq[] + hdlc_flag[] + Datapacket(168bit) + crc(16bit) + hdlc_flag[] + buffer[] + '\0'
Pleae创建一个[简短自包含的测试用例](http://sscce.org),并将其粘贴到您的问题中。 –
为什么您将_strings_用于_binary_数据有特殊原因吗? – JimmyB