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Snake Game Source Code in C

Snake Game Source Code in C

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

#define UP 72
#define LEFT 75
#define RIGHT 77
#define DOWN 80
#define ESC 1
#ifdef __cplusplus
	 #define __CPPARGS ...
#else
	 #define __CPPARGS
#endif
struct SnakeParts{
		 int x;
		 int y;
}box[50],target;
void snake(int ,int );
void initialize(int,int);
void interrupt (*prev)(__CPPARGS);
void interrupt our(__CPPARGS);
void snakeb();
int check();
void Rectangle(int ,int,int,int);
int
stop=0,blocks=4,direction=2,size=10,hit=1,snake_color=14,bk=7,target_color
=4;
int stage=1,speed=100,point=0;
void main(){
		 int gd=DETECT,gm,x=100,y=100,i=0,j=0;
		 char msg[50];
		 initgraph(&gd,&gm,"");
		 /*animation*/
		 prev=getvect(9);
   /*		 setcolor(bk);
		 rectangle(0,0,639,479);
		 setfillstyle(SOLID_FILL,bk);
		 floodfill(250,250,bk);*/
		 initialize(x,y);
		 //getch();
		 while (1){
		 		 /*setcolor(bk);
		 		 sprintf(msg,"POINT = %3d",point);
		 		 settextstyle(0,HORIZ_DIR,1);
		 		 outtextxy(550,100,msg); */
		 		 switch(direction){
		 		 		 case 0: j-=size;break;
		 		 		 case 1: j+=size;break;
		 		 		 case 2: i+=size;break;
		 		 		 case 3: i-=size;break;
		 		 }
		 		 setcolor(snake_color);
		 		 snake(x+i,y+j);//,x+15+i,y+15+j);
		 		 delay(speed);
		 		 setcolor(bk);
		 		 snakeb(/*x+i,y+j*/);//,x+15+i,y+15+j);
		 		 setvect(9,our);
		 		 if(stop==1){break;}
		 		 if(check()){break;}
		 		 if(hit==1){
		 		 		 hit=0;
		 		 		 target.x=size+size*random(25);
		 		 		 target.y=size+size*random(20);
		 		 		 setcolor(target_color);
		 		 		 setfillstyle(SOLID_FILL,target_color);
		 		 		 circle(target.x+size/2,target.y+size/2,size/2-1);
		 		 		 floodfill(target.x+size/2,target.y+size/2,target_color);
		 		 }
		 		 setfillstyle(SOLID_FILL,target_color);
		 		 setcolor(2);
		 		 circle(target.x+size/2,target.y+size/2,size/2-1);
		 		 floodfill(target.x+size/2,target.y+size/2,2);
		 		 /*setcolor(11);
		 		 sprintf(msg,"POINT = %3d",point);
		 		 settextstyle(0,HORIZ_DIR,1);
		 		 outtextxy(550,100,msg);*/
		 		 gotoxy(65,4);
		 		 printf("POINT = %3d",point);
		 		 //delay(3000);
		 		 //cleardevice();
		 }
		 closegraph();
}
void interrupt our(__CPPARGS){
		 //if(inportb(0x60)==UP){
		 		 //i=0;j
		  switch(inportb(0x60)){
		 		 case UP: if(direction==1)break;direction=0;break;
		 		 case DOWN: if(direction==0)break;direction=1;break;
		 		 case RIGHT: if(direction==3)break;direction=2;break;
		 		 case LEFT: if(direction==2)break;direction=3;break;
		 		 case 15:blocks++;break;
		 		 case ESC:  stop=1;break;
		  }

		  (*prev)();
}
void snake(int x1,int y1){//,int x2,int y2){
		 int k=0;
		 //if(getcolor()==15){
		 		 for(k=blocks-1;k>0;k--){
		 		 		 box[k].x=box[k-1].x;
		 		 		 box[k].y=box[k-1].y;
		 		 }
		 		 box[0].x=x1;
		 		 box[0].y=y1;
		 //}
		 //setfillstyle(SOLID_FILL,snake_color);
		 for(k=0;k<blocks;k++){
		 		 Rectangle(box[k].x,box[k].y,box[k].x+size,box[k].y+size);
		 		 //floodfill(box[k].x+size/2,box[k].y+size/2,snake_color);
		 }

}
void snakeb(){
		 //setfillstyle(SOLID_FILL,bk);
		 for(int k=0;k<blocks;k++){
		 		 Rectangle(box[k].x,box[k].y,box[k].x+size,box[k].y+size);
		 		 //floodfill(box[k].x+size/2,box[k].y+size/2,bk);
		 }
}
void initialize(int x,int y){
		 setcolor(bk);
		 rectangle(0,0,639,479);
		 setfillstyle(SOLID_FILL,bk);
		 floodfill(250,250,bk);
		 box[0].x=x;
		 box[0].y=y;
		 for(int i=1;i<blocks;i++){
		 		 box[i].x=x-size*i;
		 		 box[i].y=y;
		 }
		 /*for(int k=0;k<blocks;k++)
		 		 rectangle(box[k].x,box[k].y,box[k].x+15,box[k].y+15);*/
}
int check(){
		 int i;
		 char msg[50];

		 if(!(box[0].x>=0 && box[0].x<=639 && box[0].y>=0 && box[0].y<=479)){
		 		 for( i=100;i<700;i+=100){
		 		 sound(i);
		 		 delay(100);
		 		 nosound();
		 		 }
		 		 sprintf(msg,"GAME OVER");
		 		 setcolor(4);
		 		 settextstyle(1,HORIZ_DIR,6);
		 		 outtextxy(150,200,msg);
		 		 delay(3000);
		 		 cleardevice();
		 		 return 1;
		 }
		 for( i=1;i<blocks;i++){
		 		 if(box[0].x==box[i].x && box[0].y==box[i].y){
		 		 		 sprintf(msg,"GAME OVER");
		 		 		 setcolor(4);
		 		 		 settextstyle(1,HORIZ_DIR,6);
		 		 		 outtextxy(150,200,msg);
		 		 		 delay(3000);
		 		 		 cleardevice();
		 		 		 return 1;
		 		 }
		 }
		 if(box[0].x==target.x && box[0].y==target.y){
		 		 //for( i=50;i<400;i+=50){
		 		 sound(700);
		 		 delay(100);
		 		 nosound();
		 		 //}
		 		 blocks++;
		 		 point++;
		 		 hit=1;
		 		 setcolor(bk);
		 		 //circle(target.x+size/2,target.y+size/2,size/2-1);
		 		 setfillstyle(SOLID_FILL,bk);
		 		 setcolor(bk);
		 		 circle(target.x+size/2,target.y+size/2,size/2-1);
		 		 floodfill(target.x+size/2,target.y+size/2,bk);
		 }
		 if(blocks==40){
		 		 stage++;
		 		 blocks=4;
		 		 sprintf(msg,"STAGE %d CLEARED",stage-1);
		 		 setcolor(4);
		 		 settextstyle(1,HORIZ_DIR,6);
		 		 outtextxy(150,200,msg);
		 		 delay(2000);
		 		 cleardevice();
		 		 initialize(100,100);
		 		 speed=100/stage;
		 }
		 return 0;
}
void Rectangle(int x1,int y1,int x2,int y2){
		 for(int i=0;i<size/2;i++)
		 		 rectangle(x1+i,y1+i,x2-i,y2-i);
}