测验或测试程序需要帮助 [英] Quiz or test program help needed

问题描述

大家好，

首先，我会让大家知道我真的很新.

我需要一个使用数组和循环来创建20个问题测验的简单C ++程序的帮助.程序需要完成的唯一操作是允许用户输入20个多项选择答案A，B，C或D，并将用户输入的答案与一组正确的答案进行比较，以计算输入的正确答案的百分比.如果有人可以向我指出正确的方向，或者给我一个简短的例子说明我应该拥有的东西，那将不胜感激.

到目前为止，这是我所拥有的..但是数量不多.

Hello all,

First off, I''ll just let you guys know that I''m really new at this.

I need some help with a simple C++ program using arrays and loops to create a 20 question quiz. The only thing the program needs to accomplish is allow the user to enter 20 multiple choice answers A,B,C, or D and compare the user entered answers to a correct set of answers to calculate a percentage of correct answers entered. If anyone could just point me in the right direction, or give me a quick example of what I should have, that would be greatly appreciated.

This is what I have so far.. but its not much.

#include <iostream>
using namespace std;

int main()
{
	const int NUM_QUESTIONS = 20;			// Number of Questions
	char user_answers[NUM_QUESTIONS];		// Array with 20 elements
	char correct_answers[NUM_QUESTIONS];
	int count;								// Loop counter variable 
	int correct;
	char correct_answers[count] = {B, D, A, A, C, A, B, A, C, D, B, C, D, A, D, C, C, B, D, A} 

	cout << "\t\t*******************************\t\t\n";
	cout << "\t\t*****Driver''s License Exam*****\t\t\n";
	cout << "\t\t*******************************\t\t\n\n";


	for (count = 0; count < NUM_QUESTIONS; count++)
	{
		cout << (count + 1) << ". ";
		cin >> user_answers[count];
	}
	
	if (user_answers[count]==correct_answers[count])
	{
	correct++;
	}
	
	cout << endl; 
	cout << correct;

	
	return 0;
}

谢谢

Thanks

推荐答案

<br />int count; // Loop counter variable<br />int correct;<br />char correct_answers[count] = {B, D, A, A, C, A, B, A, C, D, B, C, D, A, D, C, C, B, D, A}<br />

这只会引起问题.由于未初始化计数，因此correct_answers [count]可能应该是correct_answers [NUM_QUESTIONS].

This can only cause problems. correct_answers[count] should probably be correct_answers[NUM_QUESTIONS] since count is not initialized.

类似这样的东西

Something like this

const int NUM_QUESTIONS = 20;		// Number of Questions
char user_answers[NUM_QUESTIONS];	// Array with 20 elements
char correct_answers[] = {"BDAACABACDBCDADCCBDA"}; 
int count;				// Loop counter variable 

int correct;

cout << "\t\t*******************************\t\t\n";
cout << "\t\t*****Driver''s License Exam*****\t\t\n";
cout << "\t\t*******************************\t\t\n\n";

correct = 0;
for (count = 0; count < NUM_QUESTIONS; count++)
{
	char answer;

	do
	{
		cout << (count + 1) << ". ";
		cin >> answer;
		answer = toupper(answer);
		if (answer < ''A'' || answer > ''D'')
			answer = ''?'';
		cout << endl; 
	} while (answer == ''?'');
	user_answers[count] = answer;

	if (user_answers[count]==correct_answers[count])
	{
		correct++;
	}
}

cout << endl; 
cout << correct << " answers correct" << endl;

您可能需要在重复问题的周围添加一些花哨的内容，但这应该涵盖了基础知识.

You probably need to add some fancy bits around the repeat of the question but this should cover the basics.

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