连接数组的元素 [英] concatenating elements of an array

问题描述

大家好，

我一直试图让这个工作好几天，但我仍然无法得到它。


片段：

unsigned char * a;

unsigned msg [5];


我想连接数组msg中的所有5个元素unsigned char * a。

让我们说

msg [0] =" abc";

msg [1] =" def" ;;

msg [2] =" ghi";

msg [3] =" jkl";

msg [4] =" mno";


，最后a指向一个值=" abcdefghijklmno"。

我已经尝试了常规但是仍然不成功。如果有人能够启发我，请欣赏它。谢谢。

for（int i = 0; int< 5; i ++）

a = a + msg [i]

Hi all,
I''ve been trying to get this working for days but I still couldn''t get it.

snippet:
unsigned char *a;
unsigned msg[5];

I want to concatenate all 5 elements from array msg to the unsigned char *a.
Lets say
msg[0]="abc";
msg[1]="def";
msg[2]="ghi";
msg[3]="jkl";
msg[4]="mno";

and in the end a would point to a value = "abcdefghijklmno".
I''ve tried the usuals but still unsuccessful. appreciate it if anyone could enlighten me on this. thanks.
for(int i=0;int<5;i++)
a = a + msg[i]

推荐答案

查看 strcat（）功能。


亲切的问候，


Jos

Have a look at the strcat() function.

kind regards,

Jos

别忘了为最终字符串分配足够大的char缓冲区。您需要在缓冲区中组合串联并将a设置为指向该缓冲区。

Don''t forget to allocate a big enough char buffer for the final string. You need to assemble the concatenation in a buffer and set a to point to that buffer.

man ...分段错误...我无法弄明白。所以我只是用一个捷径。将所有这些数组写入并附加到文件中，然后将其作为字符串读回。谢谢所有

man...segmentation error..i cant figure it out. so i just use a short-cut. Write and append all those arrays to a file and then read ''em back as a string. thanks all

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