struct packed_bit \*从这到main()都是无任何意义的*\{ unsigned a,b,c; int i;} main () \* 不能没有括号*\{ int data_a,data_b; \*变量要先定义*\ data_a = 8; \*变量名只能是字母数字下划线*\ data_b = 2; printf("%d\n", data_a + data_b);}运行结果:10