Unsigned b;

a =- 10； The binary code of /*a is (111111165438.

b = a； The binary code of /*b is (111111165438.

printf("%d，%u/n "，a，b)；

b = 6552 1； The binary code of /*b is (1111111/.

a = b； The binary code of /*a is (11111111/.

printf("%d，%u/n "，a，b)；

Just look at the binary storage part of the number.

Negative numbers store the complement, and positive numbers store the original code.