Question

Write a program that generates a random number between 1 and 100 and asks the user to

guess what the number is. If the user’s guess is higher than the random number, the program

should display “Too high, try again.” If the user’s guess is lower than the random number, the

program should display “Too low, try again.” The program should use a loop that repeats until

the user correctly guesses the random number. Your program should also keep a count of the

number of guesses that the user makes. When the user correctly guesses the random number,

the program should display the number of guesses.

Style guidelines

#include directives must follow header comments, before the rest of the program.

Variable names:

--must be meaningful

--loop index names can be simple (i, j, k, etc)

--The initial letter should be lowercase, following words should be capitalized, no other caps or punctuation (ie: weightInPounds). This is called "camel case".

Named constants:

—use for most numeric literals (including array sizes). —name should be all capitals with underscores:


const double TAX_RATE = 0.0675;

—should occur near the top of the program (not inside functions).

Line length of source code should be no longer than 80 characters (no wrapping of lines).

Indentation:

--Use 2-4 spaces (but be consistent throughout your program). --Indent blocks, within blocks, etc.

--Use blank lines to separate sections.

Comments for variables:

All variable declarations should be commented as follows:

int rank; // numeric value for a card, A=1, J=11, Q=12, K=13

Comments for functions:

Function definitions should be commented to describe what it does, what the parameters are, and what the function returns (when appropriate). See the template and the example below. If the function body contains more than about five statements, there should be comments to describe the various sections of code in the function body.

Template:

//***********************************************************

// function name: short description of what the function does. //

// param-1 description of first parameter (if any)

// param-2 description of second parameter (if any)

// (remaining params, if any)

// returns: description of what function returns (if not void) //***********************************************************

Example:

//***********************************************************

// getBestPlayer: determines which player scored the most points

// p the array of player information

// size the number of players in the array

// returns the name of player who scored the most points

//***********************************************************

string getBestPlayer(Player p[], int size) {

// function body goes here

}

In-code comments:

DO NOT comment every line of code! In general, try to avoid using comments that describe WHAT the code is doing. These are redundant (we can just read the code). Comments that explain WHY the code is doing what it is doing are more helpful. Try to minimize in-code comments, and write readable code instead.

Follow these recognized good programming practices:

The grader may deduct for these issues:


1. Useappropriatedatatypes:


double populationSize; // you cannot have a fractional amount 
 // of people like 2008.55, use int


2. Avoidduplicatecode(don’tcopy,pasteandmodify):


if (monthlySales > 3000) {


cout << “Commission: $" << price * 0.25 << endl;


}


else {


cout << “Commission: $" << price * 0.29 << endl;
 }


better:


double rate;


if (monthlySales > 3000) {
 rate = 0.25;


}


else {


rate = 0.29;

cout << “Commission: $" << price * rate << endl;

3. Donotuseuninitializedvariables:


int total; //should be initialized to 0;
 for (..;..;..)


total = total + x; //on first use, total has garbage in it


4. Useanamedconstantforanarraysize:


const int SIZE = 100; //NOT: int SIZE;
 . . .


double myArray[SIZE];


5. Avoidoutofboundsarrayaccess:
 for example:


for (int i=0; i<=SIZE; i++) { // when i == SIZE it goes 


// beyond the end of the array


. . . myArray[i] . . .
 }


6. Donotuseglobalvariables(butglobalnamedconstantsaregood).


7. Usereferenceparametersonlywhennecessary.

Answer 1

NOTE: Change filename, author name and date in header comment

Program starts from here

/*H**********************************************************************

* FILENAME: randomnum_guess.cpp   AUTHOR: yourname DATE: 19 March 2019

*DESCRIPTION: The program generates a random number and then ask user to guess it.

**********************************************************************H*/
#include<iostream>
#include<ctime>
#include<cstdlib>

using namespace std;

int main()
{
    srand((unsigned) time(0)); //This is used so that rand() generate differnt random number each time the program runs
  
    int randomNumber=0; //Stores the random number generated
    int userInput=0;     //Stores the input given by user
    int guess=0;        //Keep track of number of guesses
  
    randomNumber = (rand() % 100) + 1;
    cout<<"Guess what is the number?: ";
    cin>>userInput;
    guess++;
  
    while(userInput!=randomNumber)
    {
        if(userInput>randomNumber)
        cout<<"Too high, try again!\n";
        else
        cout<<"Too low,try again!\n";
        cin>>userInput;
        guess++;
    }
  
    cout<<"Congrats! You guessed the number in "<<guess<<" guesses.";
    return 0;
}

Code snippet:

Outputs

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