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  VS Arduino › Visual Micro › Installation & Troubleshooting › VM_DBG.cpp: 397:22: error: array subscript has type 'char'
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Kabron
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VM_DBG.cpp: 397:22: error: array subscript has type 'char'
Jun 16th, 2020 at 11:24am
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Hello,
Board LilyGO-T-Watchband (ESP32 Pico)
In Debug mode(not in Release) I got:
Code
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VM_DBG.cpp: 397:22: error: array subscript has type 'char' [-Werror=char-subscripts]
   pinStr[pinCharRead] = nxt
cc1plus.exe*: some warnings being treated as errors

The problem code is:
Code (C++)
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	char pinStr[4];
	char pinCharRead = 0;
	if (nxtChar == 'd') {
		// Read Our message back -> dxxxx:1 where xxxxx is the pin number (must be a number!)
		read(); // Remove d
		char nxt = read();
		while (nxt != ':') {
			pinStr[pinCharRead] = nxt;

I see no any criminal.
What is the reason and how to solve it.
Code translated to VM from here:
https://github.com/TioRuben/TTGO-T-Wristband.git

Thanks in advance
« Last Edit: Jun 16th, 2020 at 11:26am by Kabron »  
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Simon@Visual Micro
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Re: VM_DBG.cpp: 397:22: error: array subscript has type 'char'
Reply #1 - Jun 16th, 2020 at 11:39am
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This is due to the pinCharRead being a char (which can be signed on some platforms).

if you change it to unsigned char, or byte/uint this should also resolve the issue.
  
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Kabron
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Re: VM_DBG.cpp: 397:22: error: array subscript has type 'char'
Reply #2 - Jun 16th, 2020 at 1:02pm
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Exellent answer!
Thanks a lot!
  
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