字符串中如何给定sprintf err

嗨，我在正确的论坛重新启动这个线程。我是在C32论坛开始的，所以请忽略它。我已经评论了它是移动的。我在日志中有一个实例，其中SaMPTF作为字符串的一部分返回“Err”。sprintf(Buffer, ""%8s","id":%u,%d,"%s"","ID,'MessageID,'Code, 'ResponseText);Buffer被设置为"20000006","id":3477572476,4,"ERR"所以当代码工作数千次时，数据可能出现问题。将返回“NULL”，但“ERR”表示什么。我已经找到了这个返回值：返回存储在s中的字符数，不包括终止的空字符。指向分配的字符串的指针写入第一个参数。如果内存分配失败，-1由函数返回，NULL被写到字符串指针。在“MPLAB C32 Libs 51685b.pdf”中，但没有提到“ERR”，我检查了XC32手册，但是sprintf没有记录。如果有人能给我指出正确的手册，我将非常感激。NDyEdEd:我发现“Err”是由另一个处理器生成并传递给PIC32的。



      以下为原文

    Hi,

I'm restarting this thread in the correct forum. I did start it in the C32 forum so please ignore it. I have made a comment that it is moved.

I have an instance in a log where a sprintf returned "ERR" as part of the string.
                    sprintf(Buffer, ""%8s","id":%u,%d,"%s"",
                            ID,
                            MessageID,
                            Code,
                            ResponseText
                           );

Buffer was set to "20000006","id":3477572476,4,"   ERR"

So something is probably wrong with the data as the code works thousands of times.

I realise that a null string will return "NULL" but what does "ERR" signify.

I've found this

Return Value: Returns the number of characters stored in s excluding the terminating null character. A pointer to the allocated string is written to the first argument. If the memory allocation fails, -1 is returned by the function, and NULL is written to the string pointer.

in "MPLAB C32 Libs 51685b.pdf" but no mention of "ERR"

I've checked the XC32 manual but sprintf is not documented

If anyone can point me to the correct manual I would greatly obliged.

Many thanks

Andy

Edit: I have found that "   ERR" is generated by another processor and passed to the PIC32