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#include<iostream>
#include<stdlib.h>
#include<time.h>
#include<random>
using std::cout;
using std::cin;
using std::endl;
double getRandomNumber(int x, int y);
double randomNumberGenerator(int x, int y);
void decAddSub(void);
int main()
{
decAddSub();
}
double getRandomNumber(int x,int y)
{
double integer = randomNumberGenerator(x,y);
double fraction = randomNumberGenerator(x,y);
double number = integer + fraction / 100;
return number;
}
double randomNumberGenerator(int x, int y)
{
std::random_device rd;
std::default_random_engine generator(rd()); // rd() provides a random seed
std::uniform_int_distribution<int> distribution(x, y);
double number = distribution(generator);
return number;
}
struct question
{
double num1;
double num2;
char operation;
bool correct;
};
void decAddSub(void)
{
int numberOfQuestions(0), count(0); //number of question the user wants to do and the count of how many are correctly answered
question* pquestions(nullptr); //
cout << "How many questions would you like to do? ";
cin >> numberOfQuestions;
pquestions = new question[numberOfQuestions];
for (int i = 0; numberOfQuestions; i++)
{
if (getRandomNumber(-10,10)<0)
*(pquestions + i) = { getRandomNumber(0,100), getRandomNumber(0,100),'-', false};
else
*(pquestions + i) = { getRandomNumber(0, 100), getRandomNumber(0, 100), '+', false };
}
for (int i = 0;i< numberOfQuestions; i++)
{
double answer1(0); //correct answer
double answer2(0); // answer entered by the user
if (pquestions[i].operation == '+')
answer1 = pquestions[i].num1 + pquestions[2].num2;
else if (pquestions[i].operation == '-')
answer1 = pquestions[i].num1 - pquestions[i].num2;
cout << pquestions[i].num1 << ' ' << pquestions[i].operation << ' ' << pquestions[i].num2 << ' ' << '=' << ' ';
cin >> answer2;
if (answer1 == answer2)
pquestions[i].correct = true;
}
for (int i = 0; i < numberOfQuestions; i++)
{
if (pquestions[i].correct)
count++;
}
cout << "You're score is " << count << ' ' << '//' << ' ' << numberOfQuestions << ' ' << 'o' << 'r' << ' ' << count / numberOfQuestions * 100 << '%' << endl;
delete[] pquestions;
pquestions = nullptr;
return;
}
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