《unix/linux编程实践教程》学习笔记：第七章 事件驱动编程：编写一个视频游戏

gcc filename.c  - o gamename -l curses

#include <curses.h>
#include <sys/time.h>
#include <signal.h>

#define RIGHT COLS-1   /*屏幕最右*/
#define BOTTOM LINES-1 /*屏幕底部*/
#define BOARD_LENGTH   10  /*挡板长度*/
#define LEFT 0
#define TOP 0
char BALL= 'O';  /*小球图像*/
char BLANK= ' ';  /*清除小球*/

int left_board; /*挡板最左*/
int right_board; /*挡板最右*/
int is_lose=0;

int hdir;   /*横向速度*/
int vdir;   /*纵向速度*/
int pos_X;  /*小球横坐标*/
int pos_Y;  /*小球纵坐标*/

int delay=100;
void moveBall();
void init();
void control();

int main()
{

initscr();  /*初始化curses库和tty*/
crmode();
noecho();

move(6,28);            /*打印主菜单*/
attron(A_BOLD);
addstr("Welcome to the BallGame!");
move(8,20);
attroff(A_BOLD);
addstr("Help:");
move(9,23);
addstr("'N':Start a new game.");
move(10,23);
addstr("'Q':Quit game.");
move(11,23);
addstr("'KEY_LEFT' :Control baffle left  shift.");
move(12,23);
addstr("'KEY_RIGHT':Control baffle right shift.");
move(13,23);
addstr("'KEY_UP'   :Control of the ball speed.");
move(14,23);
addstr("'KEY_DOWN' :Control of the ball reducer.");
int flag=1;
char choice;
move(16,24);
addstr("Please choose your choice!(n/q):");
refresh();
choice=getch();    /*阻塞等待输入*/
while(flag){
if(choice=='q'||choice=='Q'||choice=='n'||choice=='N')
flag=0;
else  choice=getch();
}
if(choice=='n'||choice=='N'){    /*输入N游戏开始*/
clear();
move(10,25);
addstr("BallGame will start! Are you read?");
refresh();
sleep(3);
control();
}
else if(choice=='q'||choice=='Q'){   /*输入Q游戏退出*/
clear();
move(10,25);
addstr("You quit the game successfully!");
refresh();
sleep(3);
endwin();
}
endwin();  /*关闭curses库并重置tty*/
return 0;
}

void init(){
int i,j;
clear();
if(start_color()==OK){
attron(A_BOLD);
init_pair(1,COLOR_YELLOW,COLOR_BLACK);
attron(COLOR_PAIR(1));
}
//小球位置
pos_X =22;
pos_Y = BOTTOM-1;
//小球速度与方向¯
hdir=1;
vdir=-1;

//画挡板
left_board=20;
right_board=left_board+BOARD_LENGTH;
for(i=left_board;i<=right_board;i++){
move(BOTTOM,i);
addch('-');
}

//定时刷新
signal(SIGALRM,moveBall);
set_ticker(delay);

keypad(stdscr,TRUE);
attroff(A_BLINK);

is_lose=0;
move(pos_Y,pos_X);
addch(BALL);
move(LINES-1, COLS-1);
refresh();
usleep(100000);
move(LINES-1,COLS-1);
refresh();
}

void moveBall(){
if(is_lose) return;
signal(SIGALRM,moveBall);
move(pos_Y,pos_X);
addch(BLANK);
pos_X += hdir;
pos_Y += vdir;
//边界控制
if(pos_X >= RIGHT) {
hdir = -1;
beep();
}
if(pos_X <= LEFT)  {
hdir = 1;
beep();
}
if(pos_Y <= TOP)   {
vdir = 1;
beep();
}

//碰撞判断
if(pos_Y >= BOTTOM-1){
if(pos_X>=left_board&&pos_X<=right_board)
vdir=-1;
else{
is_lose=1;
move(pos_Y,pos_X);
addch(BALL);
move(LINES-1, COLS-1);
refresh();
usleep(delay*1000);
move(pos_Y,pos_X);
addch(BLANK);
pos_X += hdir;
pos_Y += vdir;
move(pos_Y,pos_X);
addch(BALL);
move(LINES-1, COLS-1);
refresh();
}
}

move(pos_Y,pos_X);
addch(BALL);
move(LINES-1, COLS-1);
refresh();
}
void control(){
init();    //初始化屏幕
int cmd;
while (1)
{
if(!is_lose){
cmd=getch();
if(cmd=='q'||cmd=='Q'||cmd==27) break;
//挡板左移
if(cmd==KEY_LEFT){
if(left_board>0){
move(BOTTOM,right_board);
addch(' ');
right_board--;
left_board--;
move(BOTTOM,left_board);
addch('-');
move(BOTTOM,RIGHT);
refresh();
}
}
//挡板右移
else if(cmd==KEY_RIGHT){
if(right_board<RIGHT){
move(BOTTOM,left_board);
addch(' ');
right_board++;
left_board++;
move(BOTTOM,right_board);
addch('-');
move(BOTTOM,RIGHT);
refresh();
}
}
//小球速度加快
else if(cmd==KEY_UP){
delay/=2;
set_ticker(delay);
}
//小球速度减慢
else if(cmd==KEY_DOWN){
delay*=2;
set_ticker(delay);
}

}
else{
//游戏失败页面
int flag=1;
char choice;
move(8,15);
addstr("Game Over!try again?(y/n):");
refresh();
choice=getch();

while(flag){
if(choice=='y'||choice=='Y'||choice=='n'||choice=='N')
flag=0;
else  choice=getch();
}
if(choice=='y'||choice=='Y'){  /*重新开始*/
delay=100;
init();
continue;
}
else if(choice=='n'||choice=='N'){   /*结束游戏*/
break;
}
}
}
}
//设置定时器
int set_ticker(int n_msecs){
struct itimerval new_timeset;
long n_sec,n_usecs;
n_sec=n_msecs/1000;
n_usecs=(n_msecs%1000)*1000L;
new_timeset.it_interval.tv_sec=n_sec;
new_timeset.it_interval.tv_usec=n_usecs;
new_timeset.it_value.tv_sec=n_sec;
new_timeset.it_value.tv_usec=n_usecs;
return setitimer(ITIMER_REAL,&new_timeset,NULL);
}