Value of char c = 255 converted to unsigned int in c++

Asked Sep 13 '22 at 13:52

Active Sep 13 '22 at 14:36

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I have the following code:

char c= 128;
printf("The value of c is %u.", c);

where the output is a large number (rubish!) and not 128.

I expected with an unsigned integer (%u), and with 8 bits (the size of char), I could represent the values 0 to 255. But it only represents up to 127.

What am I missing here? Thanks in advance

asked Sep 13 '22 at 13:52

andy

8bits represent 0 to 255 only for `unsigned char`, `char` on your platform is signed – Slava Sep 13 '22 at 13:55
2

Use `unsigned char` instead of `char`. – Luiz Sep 13 '22 at 13:55
@abdy. Curious, Why was the output value not posted instead of only "output is a large number (rubish!)"? As you are asking, might the assessment that it is rubbish be in error? – chux - Reinstate Monica Sep 13 '22 at 14:44

Value of char c = 255 converted to unsigned int in c++

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