Help with home work PLEASE......

[Sprint45]

Have the following data...

A 450 - 500 points
B 400 - 449 points
C 350 - 399 points
D 300 - 349 points
F 0 - 299 points

were the letters a,b,c,d,f are the grades needed to be output.

Must also be a paraellel array

I wrote the following using the text, but all I get is F for the letter grade. Any insight would help

Thanks in advance

#include <iostream>
#include <string>
#include <algorithm>

using std::cout;
using std::cin;
using std::endl;
using std::string;

int main()
{
//declare variables and arrays
string searchForTotalPoints = "";
int minPoints[5] = {0, 300, 350, 400, 450};
string grades[5] = {"F", "D", "C", "B", "A"};

// Get Grade to search for
cout << "Enter Total Points(Z to Exit): ";
getline(cin, searchForTotalPoints);
	
while (searchForTotalPoints != "X")
{
	
	//locate position of the totalpoints in the minPoints array
	int y = 0;    

	//keeps track of array subscripts
	while (y < 5 && grades[y] <= searchForTotalPoints) 
		y = y + 1;
		//end while

// if totalPoints found, display grade from grades array
// otherwise display error message
	if (y < 5)
		cout << "Total Points: " << grades[y] << endl;
	else
		cout << "Total Points are not valid." << endl;
	//end if

	//Get totalPoints to search for
	cout << "Enter Total Points (Z to exit): ";
	getline(cin, searchForTotalPoints);
}  //end while

return 0;
} //end of main function

[Banfa]

The problem is this loop

	//locate position of the totalpoints in the minPoints array
	int y = 0;    

	//keeps track of array subscripts
	while (y < 5 && grades[y] <= searchForTotalPoints) 
		y = y + 1;
		//end while

You are not using the minPoints array so it will never calculate correctly. Additionally because you are starting at the minimum value and working your way up. minPoints[0] is 0 and this is <= any positive number.

Use of a symbolic debugger or a large quantity of printf statements should make it clear what you program is doing and why it is wrong.

[Sprint45]

So Banfa or anyone else, are you saying i need to change the grades[] to minpoints and invert the arrays from greatest value to least value?

thanks
mike

[Banfa]

Yes I think that would probably work, but like I say try it but put in plenty of printf statements so that you can tell exactly what is going on.

[Sprint45]

Ok Banfa,

I feel really stupid now...First, my text mentions nothing about Printf statements so i have no idea what these are..sorry

2. Switched grades[0] to minPoints[0] and recieved an error so changed it back.

3. switched lowest to highest to highest to lowest and no all total point are a grade of A

I think what i'm missing is a way to tell the program which part of the array (1, 2, 3, 4 or 5) tio get the answer from when TotalPoints is inputted but were and what is the statement

Mike

[Brittany Bragdon]

Can some one please help me figure how how to had a counter to my program.
Here is my program down below and i dont know how to make it so the game will kepp tack of who one each game then total it all up at the very end. All the ++ i thought would do it. but nope, so now i'm stuck.

 //Assig3.cpp 
//Brittany Bragdon
//Section 101
//Assignment 3
//A game of rock, paper, scissors
 
#include <iostream>
#include <string>
using namespace std;
int main ()
{
char player, player_one, player_two, answer;
string player_one_name, player_two_name;
 
cout << "Here is how to play!\n"; //Directions to the game
cout << "Player one please enter P for paper, R for rock, and S scissors. \n";
cout << "Then press return.\n";
cout << "Player two please do the same thing with out looking at player ones input.\n";
cout << "At the end of each round the game will tell you who won \n";
cout << "Then you will be asked if you want to play again. \n";
cout << "Please enter Y for yes and N for no. \n";
cout << "Thank you. \n";
cout << "Now lets begin the game of Rock, Paper Scissors.\n";
 
cout << endl; //all the endl statements are to make the game look more clean when playing the game
 
cout << "Player one please enter your name, then press return.\n";
cin >> player_one_name;
 
cout << endl;
 
cout << "Player two please enter your name, then press return.\n";
cin >> player_two_name;
 
do
{
cout << endl;
 
cout << player_one_name << " please enter R, P, or S then press return. \n";
cin >> player_one;
 
cout << endl;
 
cout << player_two_name << " please enter R, P, or S then press return. \n";
cin >> player_two;
 
if((player_one == 'r' || player_one == 'R') && (player_two == 'p' || player_two == 'P'))
cout << player_two_name << " Wins!! Paper covers Rock \n";
cout << player_two_name << ++ << endl;
 
else if (( player_one == 'p' || player_one == 'P') && (player_two == 'r' || player_two == 'R'))
cout << player_one_name << " Wins!! Paper covers Rock \n";
cout << player_one_name << ++ << endl;
 
else if (( player_one == 'p' || player_one == 'P' ) && (player_two == 's' || player_two == 'S'))
cout << player_two_name << " Wins!! Scissors cut Paper\n";
cout << player_two_name << ++ << endl;
 
else if (( player_one == 's' || player_one == 'S') && (player_two == 'p' || player_two == 'P'))
cout << player_one_name << " Wins!! Scissors cut Paper \n";
cout << player_one_mane << ++ << endl;
 
else if (( player_one == 's' || player_one == 'S') && ( player_two == 'r' || player_two == 'R'))
cout << player_two_name << " Wins!! Rock breaks Scissors \n";
cout << player_two_name << ++ << endl;
 
else if (( player_one == 'r' || player_one == 'R') && (player_two == 's' || player_two == 'S'))
cout << player_one_name << " Wins!! Rock breaks Scissors \n";
cout << player_one_name << ++ << endl;
 
else if (( player_one == 's' || player_one == 'S') && (player_two == 's' || player_two == 'S'))
cout << player_one_name << " and " << player_two_name << " Tie Nobody Wins \n";
 
 
else if (( player_one == 'r' || player_one == 'R' ) && (player_two == 'r' || player_two == 'R'))
cout << player_one_name << " and " << player_two_name << " Tie Nobody Wins \n";
 
 
else if (( player_one == 'p' || player_one == 'P') && (player_two == 'p' || player_two == 'P'))
cout << player_one_name << " and " << player_two_name << " Tie Nobody Wins \n";
 
 
else
cout << " Not a valid input \n";
 
cout << endl;
 
cout << Player_one_name << "Won " << << " Times" << endl
cout << Player_two_name << "Won " << << " Times" << endl
 
cout << " Would you like to play again?\n";
cin >> answer;
 
}while(answer == 'y' || answer == 'Y');
 
 
return 0;
}

[Niheel]

Brittany, use code tags when posting code. Makes it more readable to helpers.

Thanks

[Sprint45]

Brittany

Sorry, BUT GET UR OWN THREAD,

Now no one will answer mine because they will only see ur's

[D_C]

Sprint45, since your grades are evenly spaced, take a look at the code I posted in this thread.

[Sprint45]

understand your thoughts but how does it fit in the parallel array. Does this become my If statement instead of the ( y < 5 ). if so wouldn't i also have to change the second WHILE statement?

thanks for the help
mike

[D_C]

Oops, I missed that part, about the parallel array.

You want to find i, assuming minPoints is ascending, such that
minPoints[i] <= searchForTotalP oints < minPoints[i+1].
In a sense, you need to find the underestimate. The lowest estimate, 0 should always be less than or equal to searchForTotalP oints, that doesn't help.

Instead you need to test the highest one first. Since minPoints[0] < minPoints[1] < ... < minPoints[4], you want to test against minPoints[4], or 450, first. If searchForTotalP oints is not greater than or equal to 450, we know that searchForTotalP oints is less than 450.

Suppose searchForTotalP oints = 139.
Is 139 >= 450? No, so 139 < 450.
Is 139 >= 400? No, so 139 < 400 < 450.
Is 139 >= 350? No, so 139 < 350 < 400 < 450.
Is 139 >= 300? No, so 139 < 300 < 350 < 400 < 450.
Is 139 >= 0? Yes, so 0 <= 139 < 300 < 350 < 400 < 450.

Therefore i = 0, and 0 <= 139 < 300. So the resulting grade is grades[i], or grades[0] which is "F".