dropnuke.c

C.Game.Programming.For.Dummies.原码

#include <stdio.h>
#include <stdlib.h>
#include <dos.h>
#include <conio.h>

#define VIDEO 0x10		//Video interrupt
#define COLS 80		//Screen width
#define ROWS 25		//Screen rows
#define BOTTOM_ROW 24	//Bottom Row
#define CENTER_COL 39	//Center column
#define BOMB 162		//bomb character

void pause(int seconds);
void cls(void);
void locate(int col,int row); 
void delay(int duration);

void main()
{
	int drop;

	cls();
	locate(CENTER_COL-3,BOTTOM_ROW);
	printf("REDMOND");
	locate(0,0);
	printf("Press Enter to drop nuclear weapon:");
	getch();

//This loop drops the bomb down to the city, slowly

	for(drop=0;drop<BOTTOM_ROW;drop++)
	{
		locate(CENTER_COL,drop);
		printf("%c",BOMB);
		pause(1);	//pause one second
		if(kbhit())
		{
			goto cancel;
		}
	}
	locate(CENTER_COL-3,BOTTOM_ROW);
	printf("BOOM!!!\n");
	exit(0);			//quit here

cancel:
	locate(0,24);
	printf("You saved the town!\n");
	getch();			//read in kbhit char.
}

void pause(int seconds)
{
	delay(seconds*1000);	//Borland Compilers
}

void cls(void)
{
	union REGS regs;

	regs.h.ah=0x06;	//call function 6, scroll window
	regs.h.al=0x00;	//clear screen
	regs.h.bh=0x07;	//make screen "blank" color
	regs.h.ch=0x00;	//Upper left row
	regs.h.cl=0x00;	//Upper left column
	regs.h.dh=ROWS-1;	//Lower right row
	regs.h.dl=COLS-1;	//Lower right column
	int86(VIDEO,&regs,&regs);

	locate(0,0);		//"Home" the cursor
}

void locate(int col,int row)
{
	union REGS regs;

	regs.h.ah=0x02;	//video function 2, move cursor
	regs.h.bh=0x00;	//video screen (always 0)
	regs.h.dh=row;		//cursor's row position
	regs.h.dl=col;		//cursor's col position
	int86(VIDEO,&regs,&regs);
}
 
#include <time.h>
 
void delay(int duration)
{
    clock_t done;

    done = duration + clock();
    while( done > clock() )
        ;
}