printf("\n"); while(1); }

结果： 8 9 9 8 8 9 8 7 7 8 8 7

(2)#include <stdio.h>

extern serial_initial();main() {

int x,y,z;

serial_initial();

printf("input data x,y?\n"); scanf("%d %d",&x,&y);

printf("\n x y x<y x<=y x>y x>=y x!=y x==y"); printf("\n");

printf("\n%3d%3d",x,y);

z=x<y; printf("%5d",z); z=x<=y; printf("%5d",z); z=x>y; printf("%5d",z); z=x>=y; printf("%5d",z); z=x!=y; printf("%5d",z); z=x==y; printf("%5d",z); while(1); }

执行结果：

input data x,y? 1 2

x y x<y x<=y x>y x>=y x!=y x==y 1 2 1 1 0 0 1 0 (3)#include <stdio.h> extern serial_initial(); main() {

int x,y,z;

serial_initial();

printf("input data x, y ?\n"); scanf("%d %d",&x,&y);

printf("\n x y !x x||y x&&y"); printf("\n%3d%3d",x,y);

z=!y; printf("%5d",z); z=x||y; printf("%5d",z); z=x&&y; printf("%5d",z); printf("\n");printf("\n"); printf("That is all\n"); while(1); }

执行结果：

input data x, y ?

x y !x x||y x&&y 1 2 0 1 1 That is all