Игра "100 спичек". Подскажите, что значит PrintRest?

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <graphics.h>
#include <dos.h>
#include <string.h>
 
int number = 100;
int firstComp, strateg;
 
void printRest(int rest) {
     char buffer[5];
     sprintf(buffer, "%d", rest);
     settextstyle(DEFAULT_FONT, 0, 4);
     setcolor(9);
     outtextxy(300, 200, buffer);
     settextstyle(DEFAULT_FONT, 0, 1);
}
 
void printTextWithNumber(int num, int type) {
     setcolor(8);
     char buffer[5];
     sprintf(buffer, "%d", num);
     switch(type) {
      case 1:
      setcolor(4);
    outtextxy(220, 160, "You choose number = ");
    outtextxy(380, 160, buffer);
    break;
      case 2:
      setcolor(1);
    outtextxy(220, 360, "Person ");
    outtextxy(280, 360, buffer);
    outtextxy(300, 360, "WIN!!!");
    break;
      case 3:
      setcolor(1);
    outtextxy(220, 360, "Computer ");
    outtextxy(300, 360, buffer);
    outtextxy(320, 360, "WIN!!!");
    break;
      case 4:
      setcolor(4);
    outtextxy(220, 160, "Random comp choose number = ");
    outtextxy(440, 160, buffer);
    break;
     }
 }
 
void printOpponentStep(int prevNumber) {
    char buffer[5];
    sprintf(buffer, "%d", prevNumber);
    setcolor(4);
    outtextxy(220, 280, "Opponent choose number = ");
    outtextxy(420, 280, buffer);
}
 
void printPersonHead(int personId, int prevNumber) {
    char buffer[5];
    printOpponentStep(prevNumber);
    sprintf(buffer, "%d", personId);
    setcolor(4);
    outtextxy(220, 320, "Step of person ");
    outtextxy(340, 320, buffer);
}
 
int personStep(int personId, int prevNumber) {
    int choosedNumber;
    int wrongNumber = 0;
    int color = 7;
    char ch;
    do {
    cleardevice();
    printRest(number);
    if(wrongNumber) {
       setcolor(color);
       outtextxy(220, 360, "Wrong pressed key!");
       setcolor(255);
    }
    printPersonHead(personId, prevNumber);
    ch = getch();
    if (ch < '0' || ch > '9') {
       wrongNumber = 1;
       color += 1;
       if (color > 7) color = 2;
    }
    }while (ch < '0' || ch > '9');
    choosedNumber = ch - 48;
    if (choosedNumber == 0) choosedNumber = 10;
    printTextWithNumber(choosedNumber, 1);
    getch();
    return (choosedNumber);
}
 
int computerStep(int id, int prevCompNumber, int prevPersonNumber) {
    int result;
    if (firstComp == 0) {
       result = 11 - prevPersonNumber;
    } else {
      if (strateg == 0) {
      int sum = prevCompNumber + prevPersonNumber;
      if (sum != 11 && sum > 0) {
         strateg = 1;
         result = (number - 1) % 10;
      } else {
         result = 1;
      }
      } else {
    result = (number - 1) % 10;
      }
    }
    return result;
}
int randomComputerStep(int id, int prev) {
   int result;
   cleardevice();
   printRest(number);
   printOpponentStep(prev);
   if (number < 11)
    if (number > 1)
        result = rand() % (number - 1) + 1;
    else result = 1;
   else
    result = rand() % 10 + 1;
   printTextWithNumber(result, 4);
   delay(2500);
   return result;
}
 
void printError(int errorType) {
 switch (errorType) {
    case 0:
     printf("Number not in range[1...10]! Repeat:\n");
     break;
    case 1:
    setcolor(6);
     outtextxy(220, 380,"Number too many for rest! Repeat your choose");
     getch();
     break;
 }
}
 
void initGraph() {
 int gdriver = DETECT, gmode, errorcode;
 initgraph(&gdriver, &gmode, "C:\\TurboC++\\Disk\\TurboC3\\BGI");
 errorcode = graphresult();
 if (errorcode != grOk) {
  printf("Graphics error: %s\n", grapherrormsg(errorcode));
  printf("Press any key to halt:");
  getchar();
  exit(1);
 }
}
 
void closeGraph() {
 closegraph();
}
 
void gamePersonVSPerson() {
 
 int personId = 1;
 int prevNumber = 0;
 number = 100;
 while(number > 0) {
   int currentNumber = personStep(personId, prevNumber);
   if (currentNumber > number ) {
    printError(1);
    continue;
   }
   number -= currentNumber;
   prevNumber = currentNumber;
   if (personId == 1) personId = 2;
   else personId = 1;
 }
 printRest(number);
 printTextWithNumber(personId, 2);
 getchar();
}
 
void gamePersonVSComp() {
     cleardevice();
     setcolor(1);
     outtextxy(220, 220, "First step of:");
     outtextxy(220, 235, "Key 1 - Person");
     outtextxy(220, 250, "Other - Computer");
 
     char ch = getch();
     int counter;
     if (ch - 48 == 1) {
     firstComp = 0;
     counter = 1;
     } else {
     firstComp = 1;
     counter = 0;
     }
     strateg = 0;
     number = 100;
     int prevCompNumber = 0;
     int prevPersonNumber = 0;
     while (number > 0) {
    int currNumber;
    if (counter % 2 == 0) {
       currNumber = computerStep(counter % 2 + 1, prevCompNumber, prevPersonNumber);
       prevCompNumber = currNumber;
    } else {
       currNumber = personStep(counter % 2 + 1, prevCompNumber);
       if (currNumber > number) {
          printError(1);
          continue;
       }
       prevPersonNumber = currNumber;
    }
    number -= currNumber;
    counter++;
     }
     if (counter % 2 == 0)
     printTextWithNumber(firstComp % 2 + 1, 3);
     else
     printTextWithNumber(firstComp % 2 + 1, 3);
     printRest(number);
     getch();
}
void gameCompVSComp() {
     cleardevice();
     setcolor(1);
     outtextxy(220, 220, "Random computer is:");
     outtextxy(220, 235, "Key 1 - First computer");
     outtextxy(220, 250, "Other - Second Computer");
     char ch = getch();
     int counter;
     if (ch - 48 == 1) {
     firstComp = 0;
     counter = 1;
     } else {
     firstComp = 1;
     counter = 0;
     }
     strateg = 0;
     number = 100;
     int prevCompNumber = 0;
     int prevPersonNumber = 0;
     while (number > 0) {
    int currNumber;
    if (counter % 2 == 0) {
       currNumber = computerStep(counter % 2 + 1, prevCompNumber, prevPersonNumber);
       prevCompNumber = currNumber;
    } else {
       currNumber = randomComputerStep(counter % 2 + 1, prevCompNumber);
       prevPersonNumber = currNumber;
    }
    number -= currNumber;
    counter++;
     }
     if (counter % 2 == 0)
     printTextWithNumber(firstComp % 2 + 1, 3);
     else
     printTextWithNumber(firstComp % 2 + 1, 3);
     printRest(number);
     getch();
}
 
void drawPoint(int x, int y, int hide) {
  if (hide == 1) setcolor(0);
  circle(x, y, 3);
  if (hide == 1) setcolor(2);
}
 
int drawMenu() {
  cleardevice();
  setbkcolor(7);
  char ch;
  int x = 210;
  int y = 225;
  setcolor(2);
  drawPoint(x, y, 0);
  outtextxy(220, 200, "Select game");
  setcolor(1);
  outtextxy(220, 125, "!!! WELCOME !!!");
  setcolor(4);
  outtextxy(200, 160, "THE GAME 100 MATCHES");
  setcolor(255);
  outtextxy(220, 225, "Person VS Person");
  outtextxy(220, 240, "Person VS Computer");
  outtextxy(220, 255, "Computer VS Computer");
  outtextxy(220, 270, "Help");
  outtextxy(220, 285, "Exit");
  ch = getch();
  while (ch != 13) {
   ch = getch();
   drawPoint(x, y, 1);
   switch (ch) {
    case 80:
     y += 15;
     if (y > 285) y = 225;
     break;
         case 72:
    y -= 15;
    if (y < 225) y = 285;
    break;
   }
   drawPoint(x, y, 0);
  }
  return y;
}
void help() {
cleardevice();
FILE *h;
h=fopen("C:\\HELP.TXT","r");
if ((h)==NULL) printf("Error. File not open. Check your path to file");
setcolor(15);
char str[36];
for  (int i=0; i<5; i++)  //stroki
     {
    //str[i] = (char *)malloc(35 * sizeof(char));
    fgets(str, 35, h);
    setcolor(1);
    outtextxy(230, 190 + 15 * i, str);
     }
if (getch()==13)
   {
   cleardevice();
   setbkcolor(7);
   int x = 210;
  int y = 225;
  setcolor(2);
  drawPoint(x, y, 0);
  outtextxy(220, 200, "Select game");
   setcolor(1);
  outtextxy(220, 125, "!!! WELCOME !!!");
  setcolor(4);
  outtextxy(220, 160, "THE GAME 100 MATCHES");
  setcolor(255);
  outtextxy(220, 225, "Person VS Person");
  outtextxy(220, 230, "Person VS Computer");
  outtextxy(220, 255, "Computer VS Computer");
  outtextxy(220, 270, "Help");
  outtextxy(220, 285, "Exit");
    drawPoint(0,0,0);
    int y0 = drawMenu();
    switch (y0) {
     case 225:
        gamePersonVSPerson();
        break;
     case 240:
        gamePersonVSComp();
        break;
     case 255:
        gameCompVSComp();
        break;
     case 270:
        help();
        break;
    }
 
   }
fclose(h);
}
 
void main() {
  number = 100;
  initGraph();
  int y = 0;
  do{
    y = drawMenu();
    switch (y) {
     case 225:
        gamePersonVSPerson();
        break;
     case 240:
        gamePersonVSComp();
        break;
     case 255:
        gameCompVSComp();
        break;
     case 270:
        help();
        break;
    }
  }while(y != 285);
  closeGraph();
}