main.c

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

//Declaration of all functions
void home();
void startgame();
void instructions();
void leaderboard();
void singleplayer();
void multiplayer();
int mode();
int playbullsandcows(char num[],int size,int pn);
int numberofbulls(char guess[],char num[],int size);
int numberofcows(char guess[],char num[],int size);

//Existence of the files are ensured and home() function is invoked in main() function
void main()
{
    FILE *f1,*f2;
    f1=fopen("SinglePlayer.txt","a");
    f2=fopen("MultiPlayer.txt","a");
    fclose(f1);
    fclose(f2);
    home();
}

void home() //Displays the home screen of the game
{
    system("CLS");
    printf("\n\t\t\t\t\t\tBULLS AND COWS");
    printf("\n\n\t1.Start Game");
    printf("\n\n\t2.Instructions");
    printf("\n\n\t3.View Past Results");
    printf("\n\n\t4.Quit");
    printf("\n\n\tPress the corresponding number to continue : ");
    char choice=getch();

    switch(choice) //Redirects the user to corresponding functions based on the user's choice
    {
        case '1':startgame();break;
        case '2':instructions();break;
        case '3':leaderboard();break;
        case '4':exit(0);break;
        default:home();  //Entering an invalid input would redirect to the same function again and again
    }
}

void startgame() //Its lets the user choose between single player and multi player modes
{
    system("CLS");
    printf("\n\t1.Single Player");
    printf("\n\n\t2.Multi Player");
    printf("\n\n\t3.Back");
    printf("\n\n\n\t\tPress the corresponding number to continue : ");
    char option=getch();

    switch(option)  //Redirects the user to corresponding functions based on the user's choice
    {
        case '1':singleplayer();break;
        case '2':multiplayer();break;
        case '3':home();break;
        default:startgame(); //Entering an invalid input would redirect to the same function again and again
    }
}

void instructions() //Displays all the instructions and features included in the game
{
    system("CLS");
    printf("\n\t\tInstructions");
    printf("\n\n\t'Bulls and Cows' is an old Code-Breaking mind game in which");
    printf("\n\tThe player is engaged to figure out 3, 4 or a 5 digit code by the trail and error method");
    printf("\n\tThe number of cows represent the digits that were guessed and present in the actual code");
    printf("\n\tBut not in the exact position. Example:  3564   (Guessed Number)  Number of cows = 2");
    printf("\n\t                                         /  \\ ");
    printf("\n\t                                         5986    (Actual Code)");
    printf("\n\tThe number of bulls represent the digits that were guessed and present in the actual code");
    printf("\n\tAnd also the exact same position. Example:   4365    (Guessed Number)   Number of bulls =1");
    printf("\n\t                                              |");
    printf("\n\t                                             9312");
    printf("\n\tThus the code can be found by analyzing the number of bulls and cows");
    printf("\n\tThe game provides both Single Player and Multi Player mode");
    printf("\n\n\tHave Fun!!!!");
    printf("\n\n\tPress any key to continue : ");
    getch();
    home();
}

void leaderboard() //Used to View Past results
{
    FILE *f;
    int numberofplayers=0;
    while(numberofplayers==0) //Loop to choose between Single player or Multi player results
    {
        system("CLS");
        printf("\n\t 1 . Single Player Results");
        printf("\n\n\t 2 . Multi Player Results");
        printf("\n\n\t 3 . Back to Home Screen");
        printf("\n\n\t\t Press the corresponding number to continue : ");
        char ch=getch();
        switch(ch)
        {
        case '1':numberofplayers=1;break;
        case '2':numberofplayers=2;break;
        case '3':home();break;
        default:numberofplayers=0; //Therefore the loop continues until the user enters a valid input
        }
    }
    if(numberofplayers==1)
    {
        f=fopen("SinglePlayer.txt","r"); //Singleplayer File is opened
        system("CLS");
        printf("\n\tSingle Player Results:\n\n");
    }
    else
    {
        f=fopen("MultiPlayer.txt","r"); //Multiplayer File is opened
        system("CLS");
        printf("\n\tMulti Player Results:\n\n");
    }
    char c=fgetc(f);
    if(c==EOF)    //Executed if the opened file is empty
    {
        printf("\tNo Records Found");
    }
    while(c!=EOF) //Used to print the contents in the file
    {
        printf("%c",c);
        c=fgetc(f);
    }
    fclose(f);
    printf("\n\n\tPress any key to continue : ");
    getch();
    home();
}

void singleplayer() //Invoked if the user  chooses single player mode
{
    system("CLS");
    printf("\n\t\tEnter Player Name : ");
    char name[100];
    scanf("%[^\n]",name);
    int digits=mode();// Used to choose the difficulty level ie. length of the code to be identifed
    system("CLS");
    char number[5]="     ";
    int count=0;
    while(count<digits) //Used to generate a random code
    {
        int index,flag=0,r=rand()%9+49;// r stores the ASCII value to characters between '1' and '9' inclusive
        for(index=0;index<count;index++) // the loop is to ensure that all digits of the code are  distinct
        {
            if((char)r==number[index])
            {
                flag=1;
            }
        }
        if(flag==0)
        {
            number[count]=(char)r;
            count++;
        }
    }
    FILE *f;
    f=fopen("SinglePlayer.txt","a");
    int completed=playbullsandcows(number,digits,0); //the player pays the game and Number of turns taken to complete the game is recieved
    system("CLS");
    if(completed==0) //completed is 0 if the player forfeits the game
    {
        printf("\n\n\n\t\t\tYou Have Forfeited");
        printf("\n\n\n\n\tPress any key to Continue : ");
        fprintf(f,"\t\t%s forfeited trying to identify a %d-Digit Code\n",name,digits);//stores the result in corresponding file
        fclose(f);
        getch();
        home();
    }
    else // Executed if the player does not forfeit
    {
        printf("\n\t\tCongratulations!!You Have Successfully Identified the Code");
        printf("\n\n\t\tNumber of Chances Taken : %d",completed);
        printf("\n\n\n\n\tPress any key to Continue : ");
        fprintf(f,"\t\t%s identified the %d-Digit Code in %d-Turn(s)\n",name,digits,completed);//stores the result in corresponding file
        fclose(f);
        getch();
        home();
    }
}

void multiplayer()// invoked if the user choose multi player mode
{
    char player1[100],player2[100];
    char pc1[5]="     ";
    char pc2[5]="     ";
    int p1,p2;
    system("CLS");
    printf("\n\t\tEnter Player 1 Name : ");
    scanf("%s",&player1);
    printf("\n\n\t\tEnter Player 2 Name : ");
    scanf("%s",&player2);
    int dig=mode(); // Used to choose the difficulty level ie. length of the target code
    system("CLS");
    printf("\n\tPlayer 1 :");
    printf("\n\n\t\tEnter Your %d-Digit Secret Code  :  ",dig);
    int index=0;
    while(index<dig)//Player 1 sets player 2's target
    {
        pc1[index]=getch();
        if(pc1[index]>'0'&&pc1[index]<='9')//ensures that the player enters a digit and not any other character
        {
            int ind,flag=0;
            for(ind=0;ind<index;ind++)// makes sure that the digits entered a unique
            {
                if(pc1[ind]==pc1[index])
                {
                    flag=1;
                }
            }
            if(flag==0)
            {
                index++;
                printf("*");
            }
        }
    }
    printf("\n\n\tPress any key to continue : ");
    getch();
    system("CLS");
    printf("\n\tPlayer 2 :");
    printf("\n\n\t\tEnter Your %d-Digit Secret Code  :  ",dig);
    index=0;
    while(index<dig)//Player 2 sets player 1's target
    {
        pc2[index]=getch();
        if(pc2[index]>'0'&&pc2[index]<='9')//ensures that the player enters a digit and not any other character
        {
            int ind,flag=0;
            for(ind=0;ind<index;ind++)// makes sure that the digits entered a unique
            {
                if(pc2[ind]==pc2[index])
                {
                    flag=1;
                }
            }
            if(flag==0)
            {
                index++;
                printf("*");
            }
        }
    }
    printf("\n\n\tPress any key to continue : ");
    getch();
    system("CLS");
    printf("\n\tPlayer 1 must play the game first");
    printf("\n\n\tOnce Player 1 has completed the game,");
    printf("\n\n\tPlayer 2 Shall Continue...");
    printf("\n\n\t\tPress any key to continue : ");
    getch();
    p1=playbullsandcows(pc2,dig,1);// Player 1 Plays the game and his/her number of turns taken to identify the code is recieved
    system("CLS");
    FILE *f;
    f=fopen("MultiPlayer.txt","a");
    if(p1==0)// Executed if player 1 has forfeited
    {
        printf("\n\n\t\tCongrats!!! %s",player2);
        printf("\n\n\t\t%s has won the game as %s forfeited",player2,player1);
        fprintf(f,"\t\t%s Won the game as %s forfeited in finding %d-digit code\n",player2,player1,dig);//stores the result in corresponding file
    }
    else //player 1 has not forfeited
    {
        system("CLS");
        printf("\n\t\tPlayer 1 has identified the code in %d turns",p1);
        printf("\n\n\t\tIts Player 2's Turn Now");
        printf("\n\n\t\tIdentify the code in fewer turns to win");
        printf("\n\n\t\tPress any key to continue : ");
        getch();
        p2=playbullsandcows(pc1,dig,2);// player 2 plays the game and his/her number of turns to identify the code is recieved
        system("CLS");
        if(p2==0)//player 2 has forfeited
        {
            printf("\n\n\t\tCongrats!!! %s",player1);
            printf("\n\n\t\t%s has won the game as %s forfeited",player1,player2);
            fprintf(f,"\t\t%s Won the game as %s forfeited in finding %d-digit code\n",player1,player2,dig);//stores the result in corresponding file
        }
        else if(p1==p2) //both have identified their targets in same number of turns
        {
            printf("\n\n\t\tCongrats Both the Players!!");
            printf("\n\n\t\tBoth of You have identified the code in %d turns",p1);
            printf("\n\n\t\tIts a Tie........");
            fprintf(f,"\t\tTie. %s and %s identified the code in %d-digit code in %d-Turn(s)\n",player1,player2,dig,p1);//stores the result in corresponding file
        }
        else if(p1>p2) //player 2 found the code faster than player 1
        {
            printf("\n\n\t\tCongrats!!! %s",player2);
            printf("\n\n\t\t%s(%d) has identified the code in %d turn(s)",player2,p2,p1-p2);
            printf("\n\n\t\tAhead of %s(%d)",player1,p1);
            printf("\n\n\t\t%s is the Winner!!!!.....",player2);
            fprintf(f,"\t\t%s(%d) identified %d-digit code in %d-turn(s) ahead of %s(%d)\n",player2,p2,dig,p1-p2,player1,p1);//stores the result in corresponding file
        }
        else //player 1 found the target faster than player 2
        {
            printf("\n\n\t\tCongrats!!! %s",player1);
            printf("\n\n\t\t%s(%d) has identified the code in %d turn(s)",player1,p1,p2-p1);
            printf("\n\n\t\tAhead of %s(%d)",player2,p2);
            printf("\n\n\t\t%s is the Winner!!!!.....",player1);
            fprintf(f,"\t\t%s(%d) identified %d-digit code in %d-turn(s) ahead of %s(%d)\n",player1,p1,dig,p2-p1,player2,p2);//stores the result in corresponding file
        }
    }
    fclose(f);
    printf("\n\n\t\tPress any key to continue : ");
    getch();
    home();
}

int mode() //enables the user to choose the difficulty level ie.length of code to be identified
{
    system("CLS");
    printf("\n\n\t\Choose the difficulty level : ");
    printf("\n\n\t\t1.Easy ( 3-Digit Code )");
    printf("\n\n\t\t2.Medium ( 4-Digit Code )");
    printf("\n\n\t\t3.Hard ( 5-Digit Code )");
    printf("\n\n\t\t4.Back");
    printf("\n\n\tPress the corresponding number to continue : ");
    char ch=getch();

    switch(ch)// returns the difficulty level as an integer based on the choice
    {
        case '1':return 3;
        case '2':return 4;
        case '3':return 5;
        case '4':startgame();
        default:return mode();
    }
}

int playbullsandcows(char num[],int size,int pn)//actual algorithm of the game num->code to be identified,size->length of the code,pn->player number
{
    char allguesses[100][5];//stores each guess made by the player
    int allcows[100];//stores corresponding number of cows during each guess
    int allbulls[100];//stores corresponding number of bulls during each guess
    int chance=1;//variables used to count the number of chances
    char guess[5]="     ";
    while(1>0)
    {
        system("CLS");
        if(pn!=0) //prints the player number in case of multi player mode in single player mode pn is set as 0
        {
            printf("\n\tPlayer : %d\n",pn);
        }
        if(chance>1) // Prints all previous guesses and their corresponding bulls and cows
        {
            int count;
            for(count=1;count<chance;count++)
            {
                printf("\n\t\tChance: %d  =>  ",count);
                int j;
                for(j=0;j<size;j++) printf("%c",allguesses[count-1][j]);
                printf("\tBulls => %d\tCows => %d",allbulls[count-1],allcows[count-1]);
            }
        }
        printf("\n\n\tChance : %d",chance);
        printf("\n\n\t\t\tEnter a %d-Digit number : ",size);
        int index=0;
        while(index<size)//recieves a size-digit guess from the user
        {
            guess[index]=getch();
            if(guess[index]>'0' && guess[index]<='9')//ensures the user enters a digit
            {
                printf("%c",guess[index]);
                index++;
            }
        }
        strcpy(allguesses[chance-1],guess);//stores the guess made
        int b=numberofbulls(guess,num,size);//calculates the number of bulls
        int c=numberofcows(guess,num,size);//calculates the number of cows
        allbulls[chance-1]=b;
        allcows[chance-1]=c;// these two lines store the corresponding number of bulls and cows int he array
        printf("\n\n\n\tBulls : %d",b);
        printf("\n\n\tCows : %d",c);
        if(b==size) //Player has completed the game as all digits are found and placed at correct position
        {
            printf("\n\n\t\tPress any key to continue : ");
            getch();
            return chance;//returns the number of turns taken to identify the code
        }
        printf("\n\n\t\tPress '0' to forfeit or any other key to continue : ");
        int forfeit=getch();
        if(forfeit=='0')//player has choose to forfeit the game
        {
            return 0;
        }
        chance++;
    }
}

int numberofbulls(char guess[],char num[],int size) //function to calculate the number of bulls
{
    int index,bulls=0;
    for(index=0;index<size;index++)
    {
        if(guess[index]==num[index])//checks if digits in same position are same or not
        {
            bulls++;
        }
    }
    return bulls;
}

int numberofcows(char guess[],char num[],int size) //function to calculate the number of cows
{
    int index1,index2,cows=0;
    for(index1=0;index1<size;index1++)
    {
        for(index2=0;index2<size;index2++)
        {
            if((guess[index1]==num[index2])&&(index1!=index2)) // checks if the digit in present but not in same position (present in same position makes it a bull)
            {
                cows++;
            }
        }
    }
    return cows;
}