redeclaration of 'uint8_t segs [3]
Dein-Freund opened this issue · 4 comments
Hey,
so I'm fairly new to this whole arduino thing and currently I'm trying to run a seven-segment-display. But the program refuses to start and I don't get why. Maybe someone knows a solution.
I have attached a screenshot of the program.
Hi your-friend, the error tells you that segs has been declared twice, which is not allowed in C++. Change the highlighted line to segs[2] = 0x6D.
Maybe I got you wrong, but this doesn't work either.
You are redeclaring (declaring multiple times) the variable segs.
By writing uint8_t segs[3] = {0, 0, 0}; you declare (create) the array segs and you initialize it (give it values), in this case, that's all zeroes. When you write uint8_t segs[3] = {0, 0, 0}; again, you are declaring it again, even tho it has already been declared. Thus, a redeclaration happens. What you really want to do, is to just give the array new values. Which is done by writing segs = {0, 0, 0};. By removing the datatype (uint8_t) you are only changing the values of the already existing (declared) variable. Also, there is no need for the number ([3]) because you are writing to all elements of the array at once.
tl;dr:
change the seconduint8_t segs[3] = {0, 0, 0x6D}; to segs = {0, 0, 0x6D};.
Optionally, you could write segs[2] = 0x6D;. The [2] means that we are writing to the element number two. And there is no need for braces ({}) as we are writing a single value.
Hope this helps! ☺