Question

Description

The purpose of this challenge is examine the output and write the C++ source code that produces the given output and interaction.

Requirements

1. You may use any combination of variable declarations, assignments, conditional statements, expressions, loops, etc
2. Include <cstdlib> and <ctime> to enable the use of the built-in random number generator. See below on how to use the random number generator to have the computer produce integers within a given range.

#include <iostream>
#include <cstdlib>
#include <ctime> 
int main()
{
  int v1, v2, v3;

  srand(time(NULL));
    
  // these are examples on how to use the rand() function
  // v1, v2 and v3 are assigned random numbers below in the 
  // ranges shown in the comments
  v1 = rand() % 100;         // v1 in the range 0 to 99
  v2 = rand() % 100 + 1;     // v2 in the range 1 to 100
  v3 = rand() % 30 + 1985;   // v3 in the range 1985-2014

  return 0;
}

Sample Interaction / Output

$ [ run your program ]

You have $20.00 in your account
You must guess my number (it is between 1 and 100)
You have a maximum of seven tries to guess my number

OK, I have my number
How much do you want to wager that you can guess it in seven attempts? 5.00 

OK, guess my number: 30
Your number is higher than mine. You have six attempts left

OK, guess my number: 20
Your number is lower than mine. You have five attempts left

OK, guess my number: 24
Your number is higher than mine. You have four attempts left

OK, guess my number: 22
You guessed it!
You now have $25.00 in your account

Play again (y/n)? y

You have $25.00 in your account
You must guess my number (it is between 1 and 100)
You have a maximum of seven tries to guess my number

OK, I have my number
How much do you want to wager that you can guess it in seven attempts? 10.00 

OK, guess my number: 40
Your number is lower than mine. You have six attempts left

OK, guess my number: 55
Your number is lower than mine. You have five attempts left

OK, guess my number: 65
Your number is lower than mine. You have four attempts left

OK, guess my number: 75
Your number is lower than mine. You have three attempts left

OK, guess my number: 85
Your number is lower than mine. You have two attempts left

OK, guess my number: 95
Your number is lower than mine. You have one attempt left

OK, guess my number: 100
Your number is higher than mine

You failed to guess my number

You now have $15.00 in your account

Play again (y/n)? n

$ [ back to the command prompt ]

Answer 1

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
int main()
{
int v1, v2;
char ch;
srand(time(NULL));
double amt=20,w;
while(amt>0)
{
int flag=0;
v2 = rand() % 100 + 1; // v2 in the range 1 to 100
cout<<"You have $"<<amt<<"in your account\n";
cout<<"You must guess my number (it is between 1 and 100)\n";
cout<<"You have a maximum of seven tries to guess my number\n";
cout<<"OK, I have my number\n";
cout<<"How much do you want to wager that you can guess it in seven attempts? ";
cin>>w;
for(int i=7;i>0;i--)
{

cout<<"OK, guess my number: ";
cin>>v1;
if(v1>v2)
{
cout<<"Your number is higher than mine. ";
}
else if(v1<v2)
{
cout<<"Your number is lower than mine. ";
}

else
{
cout<<"You guessed it!\n";
amt=amt+2*w;
flag=1;
break;
}
if(i!=1)
{
cout<<"You have "<<(i-1)<<" attempts left\n";
}
}
if(flag==0)
cout<<"You failed to guess my number\n";
amt=amt-w;
cout<<"You now have $"<<amt<<" in your account\n";
cout<<"\n";
cout<<"Play again (y/n)? ";
cin>>ch;
if(ch!='n'&&ch!='N')
{
break;
}
}
return 0;
}