8.1 C语言编译系统 main.c main.i (1)#if1 (1)#1“main.c” (2)int buf 2]; (2) (3)#else (3)int buf 2]; (4)int buf12]={10,20}; (4) (5)#endif (5 (6)void swap(); (6) (7)#define A buf O] (7) void swap(); (8)int main() (8) (9){ (9)int main(） (10)scanf("%d,%d",buf,buf+1) (10){ (11)swap(); (11)scanf("%d,%d",buf,buf+1); (12)swap()月 (12)printf("%d,%d",A,buf 1]); (13)printf("%d,%d",buf0],...) (13)return 0; (14)return 0; (14)} (15)8.1 C语言编译系统 main.c ( 1 ) #if 1 main.i ( 1 ) #if 1 ( 1 ) # 1 “main c” (2) int buf[2]; ( 3 ) # l ( 1 ) # 1 “main.c” (2) ( 3 ) int buf[ 2 ] ; ( 3 ) # e lse (4) int buf[2] = {10,20}; ( 5 ) # dif ( 3 ) int buf[ 2 ] ; (4) ( 5 ) ( 5 ) #endif (6) void swap( ); ( 7 ) #d fi A b f[ 0 ] ( 5 ) (6) ( 7 ) void swap( ) ; ( 7 ) #d efine A b uf[ 0 ] (8) int main( ) ( 9 ) { ( 7 ) void swap( ) ; (8) ( 9 ) int main( ) ( 9 ) { (10)scanf("%d, %d", buf, buf+1); (11) ( ) ( 9 ) int main( ) (10) { (11 ) scanf("%d , %d" , buf, buf+1 ) ; (11 )swap ( ) ; (12)printf("%d, %d", A, buf[1]); (13) t 0 ( ) ( , , , ) ; (12) swap( ); (13 ) printf("%d ,%d" ,buf [ 0], … ) ; (13 )re turn 0 ; (14) } ( ) p ( , , [ ], ) ; (14) return 0; (15) }