Thread: Comparing Arrays question

Code:

okay i feel like such a newb why the -1 in the for loops?
for (count = 0; count<=size-1; count++)
	{
		cin>> your_answers[count];
	    
	}

and also he told us to use 21 because we have to include the null terminator or some bull........

Here is some updated code:

Code:

#include <iostream>

using namespace std;

int main()
{       
	int count, correct = 0;          
	const int size = 20;
	char your_answers[size];
	char answers[size] = {'b','d','a','a','c','a','b','a','c','d','b','c','d','a','d','c','c','b','d','a'};
	cout<< " Please enter the students answers. \n" ;
	for (count = 0; count<=size-1; count++)
	{
		cin >> your_answers[count];

		while(true)
		{
			if (your_answers[count] == 'a' || your_answers[count] == 'b' || your_answers[count] == 'c' || your_answers[count] == 'd')
				break; //Break out of while loop.
			else
			{
				cout << "(" << your_answers[count] << ") Your answer is not an appropriate one. Please try again." << endl;
				cin >> your_answers[count];
			}
		}
	}

	for (count=0; count<=size-1;count++)
	{
		if (answers[count] == your_answers[count])
				   correct += 1; //If they got this one right, then add one to 'correct'.
	}

	if(correct >= 15) //They got 15 right
		 cout << "\nYou passed the test. Congratulations." << endl;
	else
		 cout << "\nYou're a failure." << endl;

	cout << "You got " << correct << " out of 20 correct." << endl;

	cout << endl; //Make a new line.

	for (count = 0; count<=size-1; count++)
	{
		cout << "Correct Answer: " << answers[count] << " | Your answer: " << your_answers[count];
		if (answers[count] == your_answers[count]) //It's correct;
			cout << " [CORRECT]." << endl;
		else
			cout << " [WRONG]." << endl;
	}

	system("PAUSE");

return 0;
}

Originally Posted by taugust7

Code:

okay i feel like such a newb why the -1 in the for loops?
for (count = 0; count<=size-1; count++)
	{
		cin>> your_answers[count];
	    
	}

and also he told us to use 21 because we have to include the null terminator or some bull........

It's -1 because arrays start at 0. So from 0 - 19 is 20. So 20 - 1 is 19.

Code:

#include <iostream>
#include <string>

using namespace std;

int main()
{       
  

	int count, correct = 0, incorrect = 0;          
	const int size = 20;
	char your_answers[size];
	char answers[size] = {'b','d','a','a','c','a','b','a','c','d','b','c','d','a','d','c','c','b','d','a'};
	cout<< " Please enter the students answers. \n" ;
	for (count = 0; count<=size-1; count++)
	{
		cin>> your_answers[count];
	    
	}

	for (count=0; count<=size-1;count++)
	{
		if (answers[count] == your_answers[count])
				   correct += 1; 
	}
	for (count=0; count<=size-1;count++)
	{ 
        if (answers[count] != your_answers[count])
	                incorrect += 1;
    }

	if(correct >= 15) 
		 cout << "You passed the test. Congratulations. " << correct << " out of 20 correct. " << endl;
	else
		 cout << "You're a failure." << endl;
cout<< "You got "<< incorrect<< " answers wrong \n";
	
system ("pause");
return 0;
}










okay so this is what i got so far, i need to find a way to show which answers i got wrong, i.e. if number[1] is wrong display number[1] of array

and i still cant figure out that damned validation

this is good, but i cant use (true)
im limited in the crap i can use so if there is another simpler way of validation i would appreciate if you could help me

its not a homework assignment,
my teacher expects us to learn loops in a week and didnt cover do's and fors,
im goin over a few assignments and tryin to get them but i need alot of help
he told us to learn do's for's while's, so im learning whats in those chapters
i also appreciate all the help man thank you so much

Code:

well either way sebastianinininnininininininininininininiininininiininiiinininin
do you know what i should look into if i want to validate my answers without using (true)

all i can think of is
if (your_answers != 'a' ||' b' ||'c'||'d')
{
 cout<< "incorrect answer, please enter a,b,c, or d. \n"
cin>> your_answers[count]
}

Code:

#include <iostream>
#include <string>

using namespace std;

int main()
{       
  

	int count, correct = 0, incorrect = 0;          
	const int size = 20;
	char your_answers[size];
	char answers[size] = {'b','d','a','a','c','a','b','a','c','d','b','c','d','a','d','c','c','b','d','a'};
	cout<< " Please enter the students answers. \n" ;
	for (count = 0; count<=size-1; count++)
	{
		cin>> your_answers[count]; 	    
	}
for (count=0; count<=size-1;count++)
	{
		if (answers[count] == your_answers[count])
				   correct += 1; 
	}
for (count=0; count<size;count++)
    {
               if (answers[count] != your_answers[count])
    	incorrect += 1;
    }
    
if(correct >= 15) 
		 cout << "You passed the test. Congratulations." << endl;
	else
		 cout << "You're a failure." << endl;
	cout << "You got " << correct << " out of 20 correct." << endl;
	cout<< " You got " << incorrect<< " out of 20 wrong. "<<endl;
	cout << endl; 
	for (count = 0; count<=size-1; count++)
	{
		cout << "Correct Answer: " << answers[count] << " | Your answer: " << your_answers[count];
		if (answers[count] == your_answers[count]) 
			cout << " [CORRECT]." << endl;
		else
			cout << " [WRONG]." << endl;
	}






	
	
system ("pause");
return 0;
}


and my output is

 Please enter the students answers.
bdaacabacdbcdadccbdd
You passed the test. Congratulations.
You got 19 out of 20 correct.
 You got 1 out of 20 wrong.

Correct Answer: b | Your answer: b [CORRECT].
Correct Answer: d | Your answer: d [CORRECT].
Correct Answer: a | Your answer: a [CORRECT].
Correct Answer: a | Your answer: a [CORRECT].
Correct Answer: c | Your answer: c [CORRECT].
Correct Answer: a | Your answer: a [CORRECT].
Correct Answer: b | Your answer: b [CORRECT].
Correct Answer: a | Your answer: a [CORRECT].
Correct Answer: c | Your answer: c [CORRECT].
Correct Answer: d | Your answer: d [CORRECT].
Correct Answer: b | Your answer: b [CORRECT].
Correct Answer: c | Your answer: c [CORRECT].
Correct Answer: d | Your answer: d [CORRECT].
Correct Answer: a | Your answer: a [CORRECT].
Correct Answer: d | Your answer: d [CORRECT].
Correct Answer: c | Your answer: c [CORRECT].
Correct Answer: c | Your answer: c [CORRECT].
Correct Answer: b | Your answer: b [CORRECT].
Correct Answer: d | Your answer: d [CORRECT].
Correct Answer: a | Your answer: d [WRONG].
Press any key to continue . . .



now i still need good output validation an i dont know how to do it

Code:

 while (your_answers != 'a', 'b', 'c', 'd')
        {
              cout<< "Your answer of "<< your_answers[count]<<" is invalid, please select A,B,C or D. \n";
              cin>> your_answers[count];
              }

i need something along these lines but i cant figure it out

thank you sir ill see what i come up with

also i dont know what the crap isalpha and tolower are, this is an intro level class and im tryin to teach myself arrays and loops ya know