unsigned char怎么定义答:include <stdio.h> void f(unsigned char v){ char c = v;unsigned char uc = v;unsigned int a = c, b = uc;int i = c, j = uc;printf("---\n");printf("%%c: %c, %c\n", c, uc);printf("%%X: %X, %X\n", c, uc);printf("%%u: %u, %u\n", a, b);pri...