Difference between char and unsigned char

Essential differences between char and unsigned char http://bbs.csdn.net/topics/270080484

The same memory: 10010000
The char * is interpreted as-112.
The unsigned char * is interpreted as 144.
If the same memory content is assigned to the integer value, the unsigned char type will still get 144, And the char type will be negative.


The real difference depends on your program. In some cases, both types are supported.


Add:
Char may be signed Char or unsigned char. It depends on your compiler.
Assume it is signed Char. If it is 8 bits, the value range is-128 .. 127.
The value range of unsigned char is 0 .. 255.

Difference between char and unsigned char