#include <stdio.h>
#define YES 1
#define NO 0
#define SOLID 0
#define DOTTED 1
#define DASHED 2
#define BLUE 4
#define GREEN 2
#define RED 1
#define BLACK 0
#define YELLOW (RED | GREEN)
#define MAGENTA (RED | BLUE)
#define CYAN (GREEN | BLUE)
#define WHITE (RED | GREEN | BLUE)
const char * colors[8]={"black","red","green","yellow","blue","magenta","cyan","white"};
struct box_props {
unsigned int opaque :1;
unsigned int fill_color :3;
unsigned int :4;
unsigned int show_border :1;
unsigned int border_color :3;
unsigned int border_style :2;
unsigned int :2;
};
void show_settings(const struct box_props * pb);
int main(void){
struct box_props box={YES,YELLOW,YES,GREEN,DASHED};
printf("Original box setting:\n");
show_settings(&box);
box.fill_color=NO;
box.fill_color=WHITE;
box.border_color=MAGENTA;
box.border_style=SOLID;
printf("\nModified box settings:\n");
show_settings(&box);
return 0;
}
void show_settings(const struct box_props * pb){
printf("Box is %s.\n",pb->opaque==YES?"shown":"transparent");
printf("The fill color is %s.\n",colors[pb->fill_color]);
printf("Border %s.\n",pb->show_border==YES?"shown":"not shown");
printf("The border style is");
switch(pb->border_style){
case SOLID:printf("solid.\n");break;
case DOTTED:printf("dotten.\n");break;
case DASHED:printf("dashed.\n");break;
default:printf("unkown type.\n");
}
#define YES 1
#define NO 0
#define SOLID 0
#define DOTTED 1
#define DASHED 2
#define BLUE 4
#define GREEN 2
#define RED 1
#define BLACK 0
#define YELLOW (RED | GREEN)
#define MAGENTA (RED | BLUE)
#define CYAN (GREEN | BLUE)
#define WHITE (RED | GREEN | BLUE)
const char * colors[8]={"black","red","green","yellow","blue","magenta","cyan","white"};
struct box_props {
unsigned int opaque :1;
unsigned int fill_color :3;
unsigned int :4;
unsigned int show_border :1;
unsigned int border_color :3;
unsigned int border_style :2;
unsigned int :2;
};
void show_settings(const struct box_props * pb);
int main(void){
struct box_props box={YES,YELLOW,YES,GREEN,DASHED};
printf("Original box setting:\n");
show_settings(&box);
box.fill_color=NO;
box.fill_color=WHITE;
box.border_color=MAGENTA;
box.border_style=SOLID;
printf("\nModified box settings:\n");
show_settings(&box);
return 0;
}
void show_settings(const struct box_props * pb){
printf("Box is %s.\n",pb->opaque==YES?"shown":"transparent");
printf("The fill color is %s.\n",colors[pb->fill_color]);
printf("Border %s.\n",pb->show_border==YES?"shown":"not shown");
printf("The border style is");
switch(pb->border_style){
case SOLID:printf("solid.\n");break;
case DOTTED:printf("dotten.\n");break;
case DASHED:printf("dashed.\n");break;
default:printf("unkown type.\n");
}
}
本文转hackfreer51CTO博客，原文链接：http://blog.51cto.com/pnig0s1992/421035，如需转载请自行联系原作者
