C++ ..code change .Look at the code bellow and try to change a little bit. The i

Question

C++ ..code change .Look at the code bellow and try to change a little bit. The intention is to have two players. Player A and Player B. Give a change to choose Player A what is your name, and Player B, what is your name. Player A will flip a coin and player B must guess head or tail.... Delete the sequence of three. I only need either head or tail. If you think to design a different code than this go ahead...but I also need to keep track of the score, just like the end of this code.

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <stdlib.h>
#define SEQLEN 3

int getseq(char *s)
{
int r = 0;
int i = 1 << (SEQLEN - 1);

while (*s && i) {
switch (*s++) {
case 'H':
case 'h':
r |= i;
break;
case 'T':
case 't':
/* 0 indicates tails, this is 0, so do nothing */
break;
default:
return -1;
}
i >>= 1;
}

return r;
}

void printseq(int seq)
{
int i;
for (i = SEQLEN - 1; i >= 0; --i)
printf("%c", seq & (1 << i) ? 'h' : 't');
}

int getuser(void)
{
int user;
char s[SEQLEN + 1];

printf("Enter your sequence of %d (h/t): ", SEQLEN);
while (1) {
/* This needs to be manually changed if SEQLEN is changed */
if (scanf("%3s", s) != 1) exit(1);
if ((user = getseq(s)) != -1) return user;
printf("Please enter only h/t characters: ");
}
}

int getai(int user)
{
int ai;

printf("Computers sequence of %d is: ", SEQLEN);
/* The ai's perfect choice will only be perfect for SEQLEN == 3 */
if (user == -1)
ai = rand() & (1 << SEQLEN) - 1;
else
ai = (user >> 1) | ((~user << 1) & (1 << SEQLEN - 1));

printseq(ai);
printf(" ");
return ai;
}

int rungame(int user, int ai)
{
/* Generate first SEQLEN flips. We only need to store the last SEQLEN
* tosses at any one time. */
int last3 = rand() & (1 << SEQLEN) - 1;

printf("Tossed sequence: ");
printseq(last3);
while (1) {
if (user == last3) {
printf(" User wins! ");
return 1;
}

if (ai == last3) {
printf(" Ai wins! ");
return 0;
}

last3 = ((last3 << 1) & (1 << SEQLEN) - 2) | (rand() & 1);
printf("%c", last3 & 1 ? 'h' : 't');
}
}

int main(void)
{
srand(time(NULL));
int playerwins = 0;
int totalgames = 0;

/* Just use ctrl-c for exit */
while (1) {
int user = -1;
int ai = -1;

printf(" ");
if (rand() & 1) {
ai = getai(user);
user = getuser();
}
else {
user = getuser();
ai = getai(user);
}

playerwins += rungame(user, ai);
totalgames++;

printf("You have won %d out of %d games ", playerwins, totalgames);
printf("================================= ");
}

return 0;
}

Explanation / Answer

Program code:

#include <iostream>

#include <stdlib.h>

#include <time.h>

#include <stdlib.h>

#include <string>

#define SEQLEN 3

using namespace std;

//main function

int main()

{

    //declare the variables

    char tos;//to store the tossed value

    //toss[] to store the characters h or t

    char toss[]={'h', 't'};

    //to maintain the winning

    int win1=0, win2=0;

    //to store the players name

    string player1, player2;

    //accept input from the player

    cout<<"Enter player 1 name: ";

    cin>>player1;

    cout<<endl;

    cout<<"Enter player 2 name: ";

    cin>>player2;

    cout<<endl;

    //to play the game for 3 times

    int count=0;

    //to store the guess toss

    char guess;

    //loop upto three games

    while(count<3)

    {

        //player 1 is tossing the coins

        cout<<" Player 1 throws the toss. ";

        tos=toss[rand()%2];//generating random toss

        //player2 guesses the number

        cout<<"Player 2 guess the toss: ";

        cin>>guess;

        cout<<"Tossed coin is: "<<tos;

        cout<<" Gussed toss is: "<<guess<<endl;

        //check whether who wins the toss

        if(guess==tos)

        {

            cout<<player2<<" wins! ";

            win2++;//increment when player2 wins

        }

        else

        {

            cout<<player1<< " wins! ";

            win1++;//increment when player1 wins

        }

        count++;

    }

    //final results

    cout<<" The final winner is: ";

    if(win1>win2)

    {

        cout<<player1<<"!"<<endl;

        cout<<player1<<" wins the matches "<<win1<<" out of "<<count;

    }

    else

    {

        cout<<player2<<"!"<<endl;

        cout<<player2<<" wins the matches "<<win2<<" out of "<<count;

    }

}

------------------------------------------------------------------------------------------------------------------------

Sample output:

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