/*ant.c*/ #define SPACE 0x20 /*按键定义*/ #define ESC 0x1b #define ANT_CHAR_EMPTY ‘+’ #define ANT_CHAR_FOOD 153 /*携带食物的蚂蚁*/ #define HOME_CHAR ‘H’ #define FOOD_CHAR ‘F’ #define FOOD_CHAR2 ‘f’ #define FOOD_HOME_COLOR 12 /*红色*/ #define BLOCK_CHAR 177 /*障碍物*/ #define MAX_ANT 50 /*蚂蚁数量*/ #define INI_SPEED 3 /*速度半径为3*3*/ #define MAXX 80 /*活动空间为80*23格*/ #define MAXY 23 #define MAX_FOOD 10000 /*最大食物量*/ #define TARGET_FOOD 200 /*需要采集回家的食物量*/ #define MAX_SMELL 5000 /*最大信息素*/ #define SMELL_DROP_RATE 0.05 /*信息素释放率*/ #define ANT_ERROR_RATE 0.02 /*蚂蚁犯错率（创新率）*/ #define ANT_EYESHOT 3 /**/ #define SMELL_GONE_SPEED 50 /*信息素消失速度*/ #define SMELL_GONE_RATE 0.05 /*信息素消失比率*/ #define TRACE_REMEMBER 50 /*蚂蚁记忆力*/ #define MAX_BLOCK 100 /*最大障碍物个数*/ #define NULL 0 #define UP 1 /*方向定义*/ #define DOWN 2 #define LEFT 3 #define RIGHT 4 #define SMELL_TYPE_FOOD 0 /*信息素类型定义*/ #define SMELL_TYPE_HOME 1 #include “stdio.h” #include “conio.h” /*getch函数需要此头文件*/ #include “dos.h” #include “stdlib.h” #include “dos.h” #include “process.h” #include “ctype.h” #include “math.h” void WorldInitial(void); /*环境初始化函数*/ void BlockInitial(void); /*障碍物地图初始化*/ void CreatBlock(void); /*产生障碍物地图*/ void SaveBlock(void); /*保存障碍物地图*/ void LoadBlock(void); /*载入障碍物地图*/ void HomeFoodInitial(void); /*食物与家的位置初始化*/ void AntInitial(void); /*蚂蚁初始化*/ void WorldChange(void); /*更改环境*/ void AntMove(void); /*蚂蚁移动*/ void AntOneStep(void); /*蚂蚁动作一步*/ void DealKey(char key); /*按键扫描，功能键有p,t,1,2,3,s,l*/ void ClearSmellDisp(void); /*关闭信息素的显示*/ void DispSmell(int type); /*显示当前信息素的情况*/ int AntNextDir(int xxx,int yyy,int ddir); /*得到蚂蚁下一次移动的方向*/ int GetMaxSmell(int type,int xxx,int yyy,int ddir); /*获取最大信息素的值*/ int IsTrace(int xxx,int yyy); /*是否是曾经走过的路径*/ int MaxLocation(int num1,int num2,int num3); /*获得三个值中最大的一个的序号*/ int CanGo(int xxx,int yyy,int ddir); /*返回可以走的路径*/ int JudgeCanGo(int xxx,int yyy); /*判断某方向是否可以通过*/ int TurnLeft(int ddir); /*左传，右转，后退*/ int TurnRight(int ddir); int TurnBack(int ddir); int MainTimer(void); /*返回自上次调用后经历了多少个10ms的时间*/ char WaitForKey(int secnum); /*没有键则等待键盘输入，有键则返回键值*/ void DispPlayTime(void); /*显示运行时间*/ int TimeUse(void); /*计算时间花费*/ void HideCur(void); /*隐藏鼠标*/ void ResetCur(void); /*重置鼠标*/ /* ————— */ struct HomeStruct { int xxx,yyy; int amount; /*已经搬运回家的食物数量*/ int TargetFood; /*需要搬运回家的食物数量*/ }home; struct FoodStruct { int xxx,yyy; int amount; /*剩余食物数量*/ }food; struct AntStruct { int xxx,yyy; /*蚂蚁当前位置*/ int dir; /*行走方向*/ int speed; /*蚂蚁速度，即计数器计到此则移动一步，所以越小蚂蚁移动越快*/ int SpeedTimer; /*速度计数器，每10ms记一次*/ int food; /*是否携带食物*/ int SmellAmount[2]; /*两种信息素的含量*/ int tracex[TRACE_REMEMBER]; /*所记忆的x坐标*/ int tracey[TRACE_REMEMBER]; /*所记忆的y坐标*/ int TracePtr; /*记录路径所用的指针*/ int IQ; /*好象没有用到。。。。。*/ }ant[MAX_ANT]; /*全局变量定义*/ int AntNow; /*当前蚂蚁*/ int timer10ms; /*记录多少个10ms已经过去*/ struct time starttime,endtime; /*起始结束时间定义*/ int Smell[2][MAXX+1][MAXY+1]; /*信息素数组*/ int block[MAXX+1][MAXY+1]; /*障碍物数组*/ int SmellGoneTimer; /*信息素消失计数器*/ int SmellDispFlag; /*信息素显示标志*/ int CanFindFood; /*可以找到获取食物的路径标志*/ int HardtoFindPath; /*找到路径比较困难的标志*/ /* —– Main ——– */ void main(void) { char KeyPress; int tu; clrscr(); HideCur(); WorldInitial(); do { timer10ms = MainTimer(); if(timer10ms) AntMove(); if(timer10ms) WorldChange(); tu = TimeUse(); if(tu>=60&&!CanFindFood) { gotoxy(1,MAXY+1); printf(“Can not find food, maybe a block world.”); WaitForKey(10); WorldInitial(); } if(tu>=180&&home.amount<100&&!HardtoFindPath) { gotoxy(1,MAXY+1); printf(“God! it is so difficult to find a path.”); if(WaitForKey(10)==0x0d) WorldInitial(); else { HardtoFindPath = 1; gotoxy(1,MAXY+1); printf(” “); } } if(home.amount>=home.TargetFood) { gettime(&endtime); KeyPress = WaitForKey(60); DispPlayTime(); WaitForKey(10); WorldInitial(); } else if(kbhit()) { KeyPress = getch(); DealKey(KeyPress); } else KeyPress = NULL; } while(KeyPress!=ESC); gettime(&endtime); DispPlayTime(); WaitForKey(10); clrscr(); ResetCur(); } /* —— general sub process ———– */ int MainTimer(void) /* output: how much 10ms have pass from last time call this process */ { static int oldhund,oldsec; struct time t; int timeuse; gettime(&t); timeuse = 0; if(t.ti_hund!=oldhund) { if(t.ti_sec!=oldsec) { timeuse+=100; oldsec = t.ti_sec; } timeuse+=t.ti_hund-oldhund; oldhund = t.ti_hund; } else timeuse = 0; return (timeuse); } char WaitForKey(int secnum) /* funtion: if have key in, exit immediately, else wait ‘secnum’ senconds then exit input: secnum — wait this senconds, must < 3600 (1 hour) output: key char, if no key in(exit when timeout), return NULL */ { int secin,secnow; int minin,minnow; int hourin,hournow; int secuse; struct time t; gettime(&t); secin = t.ti_sec; minin = t.ti_min; hourin = t.ti_hour; do { if(kbhit()) return(getch()); gettime(&t); secnow = t.ti_sec; minnow = t.ti_min; hournow = t.ti_hour; if(hournow!=hourin) minnow+=60; if(minnow>minin) secuse = (minnow-1-minin) + (secnow+60-secin); else secuse = secnow – secin; /* counting error check */ if(secuse<0) { gotoxy(1,MAXY+1); printf(“Time conuting error, any keyto exit…”); getch(); exit(3); } } while(secuse<=secnum); return (NULL); } void DispPlayTime(void) { int ph,pm,ps; ph = endtime.ti_hour – starttime.ti_hour; pm = endtime.ti_min – starttime.ti_min; ps = endtime.ti_sec – starttime.ti_sec; if(ph<0) ph+=24; if(pm<0) { ph–; pm+=60; } if(ps<0) { pm–; ps+=60; } gotoxy(1,MAXY+1); printf(“Time use: %d hour- %d min- %d sec “,ph,pm,ps); } int TimeUse(void) { int ph,pm,ps; gettime(&endtime); ph = endtime.ti_hour – starttime.ti_hour; pm = endtime.ti_min – starttime.ti_min; ps = endtime.ti_sec – starttime.ti_sec; if(ph<0) ph+=24; if(pm<0) { ph–; pm+=60; } if(ps<0) { pm–; ps+=60; } return(ps+(60*(pm+60*ph))); } void HideCur(void) { union REGS regs0; regs0.h.ah=1; regs0.h.ch=0x30; regs0.h.cl=0x31; int86(0x10,®s0,®s0); } void ResetCur(void) { union REGS regs0; regs0.h.ah=1; regs0.h.ch=0x06; regs0.h.cl=0x07; int86(0x10,®s0,®s0); } /* ———— main ANT programe ————- */ void WorldInitial(void) { int k,i,j; randomize(); clrscr(); HomeFoodInitial(); for(AntNow=0;AntNow<MAX_ANT;AntNow++) { AntInitial(); } /* of for AntNow */; BlockInitial(); for(k=0;k<=1;k++) /* SMELL TYPE FOOD and HOME */ for(i=0;i<=MAXX;i++) for(j=0;j<=MAXY;j++) Smell[k][i][j] = 0; SmellGoneTimer = 0; gettime(&starttime); SmellDispFlag = 0; CanFindFood = 0; HardtoFindPath = 0; } void BlockInitial(void) { int i,j; int bn; for(i=0;i<=MAXX;i++) for(j=0;j<=MAXY;j++) block[i][j] = 0; bn = 1+ MAX_BLOCK/2 + random(MAX_BLOCK/2); for(i=0;i<=bn;i++) CreatBlock(); } void CreatBlock(void) { int x1,y1,x2,y2; int dx,dy; int i,j; x1 = random(MAXX)+1; y1 = random(MAXY)+1; dx = random(MAXX/10)+1; dy = random(MAXY/10)+1; x2 = x1+dx; y2 = y1+dy; if(x2>MAXX) x2 = MAXX; if(y2>MAXY) y2 = MAXY; if(food.xxx>=x1&&food.xxx<=x2&&food.yyy>=y1&&food.yyy<=y2) return; if(home.xxx>=x1&&home.xxx<=x2&&home.yyy>=y1&&home.yyy<=y2) return; for(i=x1;i<=x2;i++) for(j=y1;j<=y2;j++) { block[i][j] = 1; gotoxy(i,j); putch(BLOCK_CHAR); } } void SaveBlock(void) { FILE *fp_block; char FileNameBlock[20]; int i,j; gotoxy(1,MAXY+1); printf(” “); gotoxy(1,MAXY+1); printf(“Save to file…”,FileNameBlock); gets(FileNameBlock); if(FileNameBlock[0]==0) strcpy(FileNameBlock,”Ant.ant”); else strcat(FileNameBlock,”.ant”); if ((fp_block = fopen(FileNameBlock, “wb”)) == NULL) { gotoxy(1,MAXY+1); printf(“Creat file %s fail…”,FileNameBlock); getch(); exit(2); } gotoxy(1,MAXY+1); printf(” “); fputc(home.xxx,fp_block); fputc(home.yyy,fp_block); fputc(food.xxx,fp_block); fputc(food.yyy,fp_block); for(i=0;i<=MAXX;i++) for(j=0;j<=MAXY;j++) fputc(block[i][j],fp_block); fclose(fp_block); } void LoadBlock(void) { FILE *fp_block; char FileNameBlock[20]; int i,j,k; gotoxy(1,MAXY+1); printf(” “); gotoxy(1,MAXY+1); printf(“Load file…”,FileNameBlock); gets(FileNameBlock); if(FileNameBlock[0]==0) strcpy(FileNameBlock,”Ant.ant”); else strcat(FileNameBlock,”.ant”); if ((fp_block = fopen(FileNameBlock, “rb”)) == NULL) { gotoxy(1,MAXY+1); printf(“Open file %s fail…”,FileNameBlock); getch(); exit(2); } clrscr(); home.xxx = fgetc(fp_block); home.yyy = fgetc(fp_block); food.xxx = fgetc(fp_block); food.yyy = fgetc(fp_block); gotoxy(home.xxx,home.yyy); putch(HOME_CHAR); gotoxy(food.xxx,food.yyy); putch(FOOD_CHAR); food.amount = random(MAX_FOOD/3)+2*MAX_FOOD/3+1; /* food.amount = MAX_FOOD; */ home.amount = 0; home.TargetFood = (food.amount<TARGET_FOOD)?food.amount:TARGET_FOOD; for(AntNow=0;AntNow<MAX_ANT;AntNow++) { AntInitial(); } /* of for AntNow */; for(i=0;i<=MAXX;i++) for(j=0;j<=MAXY;j++) { block[i][j] = fgetc(fp_block); if(block[i][j]) { gotoxy(i,j); putch(BLOCK_CHAR); } } for(k=0;k<=1;k++) /* SMELL TYPE FOOD and HOME */ for(i=0;i<=MAXX;i++) for(j=0;j<=MAXY;j++) Smell[k][i][j] = 0; SmellGoneTimer = 0; gettime(&starttime); SmellDispFlag = 0; CanFindFood = 0; HardtoFindPath = 0; fclose(fp_block); } void HomeFoodInitial(void) { int randnum; int homeplace; /* 1 — home at left-up, food at right-down 2 — home at left-down, food at right-up 3 — home at right-up, food at left-down 4 — home at right-down, food at left-up */ randnum = random(100); if(randnum<25) homeplace = 1; else if (randnum>=25&&randnum<50) homeplace = 2; else if (randnum>=50&&randnum<75) homeplace = 3; else homeplace = 4; switch(homeplace) { case 1: home.xxx = random(MAXX/3)+1; home.yyy = random(MAXY/3)+1; food.xxx = random(MAXX/3)+2*MAXX/3+1; food.yyy = random(MAXY/3)+2*MAXY/3+1; break; case 2: home.xxx = random(MAXX/3)+1; home.yyy = random(MAXY/3)+2*MAXY/3+1; food.xxx = random(MAXX/3)+2*MAXX/3+1; food.yyy = random(MAXY/3)+1; break; case 3: home.xxx = random(MAXX/3)+2*MAXX/3+1; home.yyy = random(MAXY/3)+1; food.xxx = random(MAXX/3)+1; food.yyy = random(MAXY/3)+2*MAXY/3+1; break; case 4: home.xxx = random(MAXX/3)+2*MAXX/3+1; home.yyy = random(MAXY/3)+2*MAXY/3+1; food.xxx = random(MAXX/3)+1; food.yyy = random(MAXY/3)+1; break; } food.amount = random(MAX_FOOD/3)+2*MAX_FOOD/3+1; /* food.amount = MAX_FOOD; */ home.amount = 0; home.TargetFood = (food.amount<TARGET_FOOD)?food.amount:TARGET_FOOD; /* data correctness check */ if(home.xxx<=0||home.xxx>MAXX||home.yyy<=0||home.yyy>MAXY|| food.xxx<=0||food.xxx>MAXX||food.yyy<=0||food.yyy>MAXY|| food.amount<=0) { gotoxy(1,MAXY+1); printf(“World initial fail, any key to exit…”); getch(); exit(2); } gotoxy(home.xxx,home.yyy); putch(HOME_CHAR); gotoxy(food.xxx,food.yyy); putch(FOOD_CHAR); }void AntInitial(void) /* initial ant[AntNow] */ { int randnum; int i; ant[AntNow].xxx = home.xxx; ant[AntNow].yyy = home.yyy; randnum = random(100); if(randnum<25) ant[AntNow].dir = UP; else if (randnum>=25&&randnum<50) ant[AntNow].dir = DOWN; else if (randnum>=50&&randnum<75) ant[AntNow].dir = LEFT; else ant[AntNow].dir = RIGHT; ant[AntNow].speed = 2*(random(INI_SPEED/2)+1); ant[AntNow].SpeedTimer = 0; ant[AntNow].food = 0; ant[AntNow].SmellAmount[SMELL_TYPE_FOOD] = 0; ant[AntNow].SmellAmount[SMELL_TYPE_HOME] = MAX_SMELL; ant[AntNow].IQ = 1; for(i=0;i<TRACE_REMEMBER;i++) { ant[AntNow].tracex[i] = 0; ant[AntNow].tracey[i] = 0; } ant[AntNow].TracePtr = 0; /* a sepecail ant */ if(AntNow==0) ant[AntNow].speed = INI_SPEED; } void WorldChange(void) { int k,i,j; int smelldisp; SmellGoneTimer+=timer10ms; if(SmellGoneTimer>=SMELL_GONE_SPEED) { SmellGoneTimer = 0; for(k=0;k<=1;k++) /* SMELL TYPE FOOD and HOME */ for(i=1;i<=MAXX;i++) for(j=1;j<=MAXY;j++) { if(Smell[k][i][j]) { smelldisp = 1+((10*Smell[k][i][j])/(MAX_SMELL*SMELL_DROP_RATE)); if(smelldisp>=30000||smelldisp<0) smelldisp = 30000; if(SmellDispFlag) { gotoxy(i,j); if((i==food.xxx&&j==food.yyy)||(i==home.xxx&&j==home.yyy)) /* don’t over write Food and Home */; else { if(smelldisp>9) putch(‘#’); else putch(smelldisp+’0′); } } Smell[k][i][j]-= 1+(Smell[k][i][j]*SMELL_GONE_RATE); if(Smell[k][i][j]<0) Smell[k][i][j] = 0; if(SmellDispFlag) { if(Smell[k][i][j]<=2) { gotoxy(i,j); putch(SPACE); } } } } /* of one location */ } /* of time to change the world */ } /* of world change */ void AntMove(void) { int antx,anty; int smelltodrop,smellnow; for(AntNow=0;AntNow<MAX_ANT;AntNow++) { ant[AntNow].SpeedTimer+=timer10ms; if(ant[AntNow].SpeedTimer>=ant[AntNow].speed) { ant[AntNow].SpeedTimer = 0; gotoxy(ant[AntNow].xxx,ant[AntNow].yyy); putch(SPACE); AntOneStep(); gotoxy(ant[AntNow].xxx,ant[AntNow].yyy); /* ant0 is a sepecail ant, use different color */ if(AntNow==0) textcolor(0xd); if(ant[AntNow].food) putch(ANT_CHAR_FOOD); else putch(ANT_CHAR_EMPTY); if(AntNow==0) textcolor(0x7); /* remember trace */ ant[AntNow].tracex[ant[AntNow].TracePtr] = ant[AntNow].xxx; ant[AntNow].tracey[ant[AntNow].TracePtr] = ant[AntNow].yyy; if(++(ant[AntNow].TracePtr)>=TRACE_REMEMBER) ant[AntNow].TracePtr = 0; /* drop smell */ antx = ant[AntNow].xxx; anty = ant[AntNow].yyy; if(ant[AntNow].food) /* have food, looking for home */ { if(ant[AntNow].SmellAmount[SMELL_TYPE_FOOD]) { smellnow = Smell[SMELL_TYPE_FOOD][antx][anty]; smelltodrop = ant[AntNow].SmellAmount[SMELL_TYPE_FOOD]*SMELL_DROP_RATE; if(smelltodrop>smellnow) Smell[SMELL_TYPE_FOOD][antx][anty] = smelltodrop; /* else Smell[…] = smellnow */ ant[AntNow].SmellAmount[SMELL_TYPE_FOOD]-= smelltodrop; if(ant[AntNow].SmellAmount[SMELL_TYPE_FOOD]<0) ant[AntNow].SmellAmount[SMELL_TYPE_FOOD] = 0; } /* of have smell to drop */ } /* of have food */ else /* no food, looking for food */ { if(ant[AntNow].SmellAmount[SMELL_TYPE_HOME]) { smellnow = Smell[SMELL_TYPE_HOME][antx][anty]; smelltodrop = ant[AntNow].SmellAmount[SMELL_TYPE_HOME]*SMELL_DROP_RATE; if(smelltodrop>smellnow) Smell[SMELL_TYPE_HOME][antx][anty] = smelltodrop; /* else Smell[…] = smellnow */ ant[AntNow].SmellAmount[SMELL_TYPE_HOME]-= smelltodrop; if(ant[AntNow].SmellAmount[SMELL_TYPE_HOME]<0) ant[AntNow].SmellAmount[SMELL_TYPE_HOME] = 0; } /* of have smell to drop */ } } /* of time to go */ /* else not go */ } /* of for AntNow */ textcolor(FOOD_HOME_COLOR); gotoxy(home.xxx,home.yyy); putch(HOME_CHAR); gotoxy(food.xxx,food.yyy); if(food.amount>0) putch(FOOD_CHAR); else putch(FOOD_CHAR2); textcolor(7); gotoxy(1,MAXY+1); printf(“Food %d, Home %d “,food.amount,home.amount); } void AntOneStep(void) { int ddir,tttx,ttty; int i; ddir = ant[AntNow].dir; tttx = ant[AntNow].xxx; ttty = ant[AntNow].yyy; ddir = AntNextDir(tttx,ttty,ddir); switch(ddir) { case UP: ttty–; break; case DOWN: ttty++; break; case LEFT: tttx–; break; case RIGHT: tttx++; break; default: break; } /* of switch dir */ ant[AntNow].dir = ddir; ant[AntNow].xxx = tttx; ant[AntNow].yyy = ttty; if(ant[AntNow].food) /* this ant carry with food, search for home */ { if(tttx==home.xxx&&ttty==home.yyy) { home.amount++; AntInitial(); } if(tttx==food.xxx&&ttty==food.yyy) ant[AntNow].SmellAmount[SMELL_TYPE_FOOD] = MAX_SMELL; } /* of search for home */ else /* this ant is empty, search for food */ { if(tttx==food.xxx&&ttty==food.yyy) { if(food.amount>0) { ant[AntNow].food = 1; food.amount–; ant[AntNow].SmellAmount[SMELL_TYPE_FOOD] = MAX_SMELL; ant[AntNow].SmellAmount[SMELL_TYPE_HOME] = 0; ant[AntNow].dir = TurnBack(ant[AntNow].dir); for(i=0;i<TRACE_REMEMBER;i++) { ant[AntNow].tracex[i] = 0; ant[AntNow].tracey[i] = 0; } ant[AntNow].TracePtr = 0; CanFindFood = 1; } /* of still have food */ } if(tttx==home.xxx&&ttty==home.yyy) ant[AntNow].SmellAmount[SMELL_TYPE_HOME] = MAX_SMELL; } /* of search for food */ } void DealKey(char key) { int i; switch(key) { case ‘p’: gettime(&endtime); DispPlayTime(); getch(); gotoxy(1,MAXY+1); for(i=1;i<=MAXX-1;i++) putch(SPACE); break; case ‘t’: if(SmellDispFlag) { SmellDispFlag=0; ClearSmellDisp(); } else SmellDispFlag = 1; break; case ‘1’: DispSmell(SMELL_TYPE_FOOD); getch(); ClearSmellDisp(); break; case ‘2’: DispSmell(SMELL_TYPE_HOME); getch(); ClearSmellDisp(); break; case ‘3’: DispSmell(2); getch(); ClearSmellDisp(); break; case ‘s’: SaveBlock(); break; case ‘l’: LoadBlock(); break; default: gotoxy(1,MAXY+1); for(i=1;i<=MAXX-1;i++) putch(SPACE); } /* of switch */ } void ClearSmellDisp(void) { int k,i,j; for(k=0;k<=1;k++) /* SMELL TYPE FOOD and HOME */ for(i=1;i<=MAXX;i++) for(j=1;j<=MAXY;j++) { if(Smell[k][i][j]) { gotoxy(i,j); putch(SPACE); } } /* of one location */ } void DispSmell(int type) /* input: 0 — Only display food smell 1 — Only display home smell 2 — Display both food and home smell */ { int k,i,j; int fromk,tok; int smelldisp; switch(type) { case 0: fromk = 0; tok = 0; break; case 1: fromk = 1; tok = 1; break; case 2: fromk = 0; tok = 1; break; default:fromk = 0; tok = 1; break; } SmellGoneTimer = 0; for(k=fromk;k<=tok;k++) /* SMELL TYPE FOOD and HOME */ for(i=1;i<=MAXX;i++) for(j=1;j<=MAXY;j++) { if(Smell[k][i][j]) { smelldisp = 1+((10*Smell[k][i][j])/(MAX_SMELL*SMELL_DROP_RATE)); if(smelldisp>=30000||smelldisp<0) smelldisp = 30000; gotoxy(i,j); if(i!=food.xxx||j!=food.yyy) { if((i==food.xxx&&j==food.yyy)||(i==home.xxx&&j==home.yyy)) /* don’t over write Food and Home */; else { if(smelldisp>9) putch(‘#’); else putch(smelldisp+’0′); } } } } /* of one location */ } int AntNextDir(int xxx,int yyy,int ddir) { int randnum; int testdir; int CanGoState; int cangof,cangol,cangor; int msf,msl,msr,maxms; int type; CanGoState = CanGo(xxx,yyy,ddir); if(CanGoState==0||CanGoState==2||CanGoState==3||CanGoState==6) cangof = 1; else cangof = 0; if(CanGoState==0||CanGoState==1||CanGoState==3||CanGoState==5) cangol = 1; else cangol = 0; if(CanGoState==0||CanGoState==1||CanGoState==2||CanGoState==4) cangor = 1; else cangor = 0; if(ant[AntNow].food) type = SMELL_TYPE_HOME; else type = SMELL_TYPE_FOOD; msf = GetMaxSmell(type,xxx,yyy,ddir); msl = GetMaxSmell(type,xxx,yyy,TurnLeft(ddir)); msr= GetMaxSmell(type,xxx,yyy,TurnRight(ddir)); maxms = MaxLocation(msf,msl,msr); /* maxms – 1 – msf is MAX 2 – msl is MAX 3 – msr is MAX 0 – all 3 number is 0 */ testdir = NULL; switch(maxms) { case 0: /* all is 0, keep testdir = NULL, random select dir */ break; case 1: if(cangof) testdir = ddir; else if(msl>msr) if(cangol) testdir = TurnLeft(ddir); else if(cangor) testdir = TurnRight(ddir); break; case 2: if(cangol) testdir = TurnLeft(ddir); else if(msf>msr) if(cangof) testdir = ddir; else if(cangor) testdir = TurnRight(ddir); break; case 3: if(cangor) testdir = TurnRight(ddir); else if(msf>msl) if(cangof) testdir =ddir; else if(cangol) testdir = TurnLeft(ddir); break; default:break; } /* of maxms */ randnum = random(1000); if(randnum<SMELL_DROP_RATE*1000||testdir==NULL) /* 1. if testdir = NULL, means can not find the max smell or the dir to max smell can not go then random select dir 2. if ant error, don’t follow the smell, random select dir */ { randnum = random(100); switch(CanGoState) { case 0: if(randnum<90) testdir = ddir; else if (randnum>=90&&randnum<95) testdir = TurnLeft(ddir); else testdir = TurnRight(ddir); break; case 1: if(randnum<50) testdir = TurnLeft(ddir); else testdir = TurnRight(ddir); break; case 2: if(randnum<90) testdir = ddir; else testdir = TurnRight(ddir); break; case 3: if(randnum<90) testdir = ddir; else testdir = TurnLeft(ddir); break; case 4: testdir = TurnRight(ddir); break; case 5: testdir = TurnLeft(ddir); break; case 6: testdir = ddir; break; case 7: testdir = TurnBack(ddir); break; default:testdir = TurnBack(ddir); } /* of can go state */ } return(testdir); } int GetMaxSmell(int type,int xxx,int yyy,int ddir) { int i,j; int ms; /* MAX smell */ ms = 0; switch(ddir) { case UP: for(i=xxx-ANT_EYESHOT;i<=xxx+ANT_EYESHOT;i++) for(j=yyy-ANT_EYESHOT;j<yyy;j++) { if(!JudgeCanGo(i,j)) continue; if((i==food.xxx&&j==food.yyy&&type==SMELL_TYPE_FOOD)|| (i==home.xxx&&j==home.yyy&&type==SMELL_TYPE_HOME)) { ms = MAX_SMELL; break; } if(IsTrace(i,j)) continue; if(Smell[type][i][j]>ms) ms = Smell[type][i][j]; } break; case DOWN: for(i=xxx-ANT_EYESHOT;i<=xxx+ANT_EYESHOT;i++) for(j=yyy+1;j<=yyy+ANT_EYESHOT;j++) { if(!JudgeCanGo(i,j)) continue; if((i==food.xxx&&j==food.yyy&&type==SMELL_TYPE_FOOD)|| (i==home.xxx&&j==home.yyy&&type==SMELL_TYPE_HOME)) { ms = MAX_SMELL; break; } if(IsTrace(i,j)) continue; if(Smell[type][i][j]>ms) ms = Smell[type][i][j]; } break; case LEFT: for(i=xxx-ANT_EYESHOT;i<xxx;i++) for(j=yyy-ANT_EYESHOT;j<=yyy+ANT_EYESHOT;j++) { if(!JudgeCanGo(i,j)) continue; if((i==food.xxx&&j==food.yyy&&type==SMELL_TYPE_FOOD)|| (i==home.xxx&&j==home.yyy&&type==SMELL_TYPE_HOME)) { ms = MAX_SMELL; break; } if(IsTrace(i,j)) continue; if(Smell[type][i][j]>ms) ms = Smell[type][i][j]; } break; case RIGHT: for(i=xxx+1;i<=xxx+ANT_EYESHOT;i++) for(j=yyy-ANT_EYESHOT;j<=yyy+ANT_EYESHOT;j++) { if(!JudgeCanGo(i,j)) continue; if((i==food.xxx&&j==food.yyy&&type==SMELL_TYPE_FOOD)|| (i==home.xxx&&j==home.yyy&&type==SMELL_TYPE_HOME)) { ms = MAX_SMELL; break; } if(IsTrace(i,j)) continue; if(Smell[type][i][j]>ms) ms = Smell[type][i][j]; } break; default: break; } return(ms); } int IsTrace(int xxx,int yyy) { int i; for(i=0;i<TRACE_REMEMBER;i++) if(ant[AntNow].tracex[i]==xxx&&ant[AntNow].tracey[i]==yyy) return(1); return(0); } int MaxLocation(int num1,int num2,int num3) { int maxnum; if(num1==0&&num2==0&&num3==0) return(0); maxnum = num1; if(num2>maxnum) maxnum = num2; if(num3>maxnum) maxnum = num3; if(maxnum==num1) return(1); if(maxnum==num2) return(2); if(maxnum==num3) return(3); } int CanGo(int xxx,int yyy,int ddir) /* input: xxx,yyy – location of ant ddir – now dir output: 0 – forward and left and right can go 1 – forward can not go 2 – left can not go 3 – right can not go 4 – forward and left can not go 5 – forward and right can not go 6 – left and right can not go 7 – forward and left and right all can not go */ { int tx,ty,tdir; int okf,okl,okr; /* forward can go ? */ tdir = ddir; tx = xxx; ty = yyy; switch(tdir) { case UP: ty–; break; case DOWN: ty++; break; case LEFT: tx–; break; case RIGHT: tx++; break; default: break; } /* of switch dir */ if(JudgeCanGo(tx,ty)) okf = 1; else okf = 0; /* turn left can go ? */ tdir = TurnLeft(ddir); tx = xxx; ty = yyy; switch(tdir) { case UP: ty–; break; case DOWN: ty++; break; case LEFT: tx–; break; case RIGHT: tx++; break; default: break; } /* of switch dir */ if(JudgeCanGo(tx,ty)) okl = 1; else okl = 0; /* turn right can go ? */ tdir = TurnRight(ddir); tx = xxx; ty = yyy; switch(tdir) { case UP: ty–; break; case DOWN: ty++; break; case LEFT: tx–; break; case RIGHT: tx++; break; default: break; } /* of switch dir */ if(JudgeCanGo(tx,ty)) okr = 1; else okr = 0; if(okf&&okl&&okr) return(0); if(!okf&&okl&&okr) return(1); if(okf&&!okl&&okr) return(2); if(okf&&okl&&!okr) return(3); if(!okf&&!okl&&okr) return(4); if(!okf&&okl&&!okr) return(5); if(okf&&!okl&&!okr) return(6); if(!okf&&!okl&&!okr) return(7); return(7); } int JudgeCanGo(int xxx,int yyy) /* input: location to judeg output: 0 — can not go 1 — can go */ { int i,j; if(xxx<=0||xxx>MAXX) return(0); if(yyy<=0||yyy>MAXY) return(0); if(block[xxx][yyy]) return(0); return(1); } int TurnLeft(int ddir) { switch(ddir) { case UP: return(LEFT); case DOWN: return(RIGHT); case LEFT: return(DOWN); case RIGHT: return(UP); default: break; } /* of switch dir */ } int TurnRight(int ddir) { switch(ddir) { case UP: return(RIGHT); case DOWN: return(LEFT); case LEFT: return(UP); case RIGHT: return(DOWN); default: break; } /* of switch dir */ } int TurnBack(int ddir) { switch(ddir) { case UP: return(DOWN); case DOWN: return(UP); case LEFT: return(RIGHT); case RIGHT: return(LEFT); default: break; } /* of switch dir */ }