Question

Math Problem Generator

Your job will be to write a C++ program to teach math to school children. Your program will accomplish this by showing sets of math problems to the user and allowing them to enter an answer. The program should tell the user if they are correct and should continue providing additional questions. The program will keep track of correct and incorrect answers. The questions should use random numbers and should be simple enough math problems that someone could do them without a calculator (ie. 8 + 17 =). The program will be timed (60 seconds for instance – this should be variable) and should keep track of how many you have gotten correct and incorrect during the time limit. As the user correctly answers the questions the difficulty should increase:
1+4 =
15+2-1=
…
15 + 22 * (18 / 2) % 14 =

Lastly, the program should have some kind of end and review screen which shows the user’s score and allows them to restart.

Sample Run:

Welcome to Math Friend, the best math game ever made. You will be
presented with a series of questions that you will be required to
answer. You have 60 seconds to answer as many questions as possible
and your time will start NOW!!!

60 seconds remaining

Question 1:

81 – 5 = _

76

Correct!

43 seconds remaining

Question 2:

9 * 3 – 1 = _

22

Incorrect : (

The answer was 26

37 seconds remaining

Question 3:

6+9 - _ = 7

11

Incorrect : (

The answer was 8

22 seconds remaining

Question 4:

6 - 22 = _

-18

Incorrect : (

The answer was -16

Time has elapsed

____________________________________________________________________

You reached question 4

Correct responses: 1

Incorrect responses: 3

Would you like to play again (y/n)

n

Thank you for playing…

Answer 1

#include "iostream"

#include <ctime>

using namespace std;

// function to generate an easy question invlcing only one operator

int generateEasyQuestion(){

int number1,number2;

int range = (10-1)+1;

srand(time(0));

number1 = range * (rand() / (RAND_MAX + 1.0)); // generate a random number

number2 = range * (rand() / (RAND_MAX + 1.0)); // generate second random number

while (number1 <= 0) { // if random number is zero generate again

number1 = range * (rand() / (RAND_MAX + 1.0));

}

number2 = range * (rand() / (RAND_MAX + 1.0));

while(number2 <= 0){ // if random number is zero generate again

number2 = range * (rand() / (RAND_MAX + 1.0));

}

int operator_range = (4-1)+1;

int operator1;

operator1 = operator_range * (rand() / (RAND_MAX + 1.0)); // generate a random number to chose operator

string expression = std::to_string(number1);

int answer = 0;

if (operator1 == 1){ // if random num is 1 operator is +

expression.append(" + ");

expression += std::to_string(number2);

answer = number1 + number2;

} else if(operator1 == 2) { // if random num is 2 operator is -

expression.append(" - ");

expression += std::to_string(number2);

answer = number1 - number2;

} else if(operator1 == 3){ // if random num is 3 operator is *

expression.append(" * ");

expression += std::to_string(number2);

   answer = number1 * number2;

} else{

expression.append(" / "); // if random num is other than above operator is /

expression += std::to_string(number2);

answer = number1 / number2;

}

expression.append(" = "); // append "=" at end

cout << expression << endl;

  

return answer;

}

//function to generate difficult question involving 2 operators

int generateDifficultQuestion(){

int number1,number2,number3;

srand(time(0));

int range = (10-1)+1;

number1 = range * (rand() / (RAND_MAX + 1.0)); // generate a random number

while (number1 <= 0) { // if random number is zero generate again

number1 = range * (rand() / (RAND_MAX + 1.0));

}

number2 = range * (rand() / (RAND_MAX + 1.0)); // generate a random number

while(number2 <= 0){ // if random number is zero generate again

   number2 = range * (rand() / (RAND_MAX + 1.0));

}

number3 = range * (rand() / (RAND_MAX + 1.0));// generate a random number

while(number3 <=0){ // if random number is zero generate again

   number3 = range * (rand() / (RAND_MAX + 1.0));

}

int operator_range = (4-1)+1;

int operator1,operator2,operator3;

operator1 = operator_range * (rand() / (RAND_MAX + 1.0)); // generate a random number to chose operator

operator2 = operator_range * (rand() / (RAND_MAX + 1.0)); // generate a random number to chose operator

operator3 = operator_range * (rand() / (RAND_MAX + 1.0)); // generate a random number to chose operator

string expression = std::to_string(number1);

int answer = 0;

if (operator1 == 1){ // if random num is 1 operator is +

expression.append(" + ");

expression += std::to_string(number2);

if (operator2 == 1){

expression.append(" + ");

expression += std::to_string(number3);

answer = number1+number2+number3;

} else if(operator2 == 2) {

expression.append(" - ");

expression += std::to_string(number3);

answer = number1+number2-number3;

} else if(operator2 == 3){

expression.append(" * ");

expression += std::to_string(number3);

   answer = number1+number2*number3;

} else{

expression.append(" / ");

expression += std::to_string(number3);

   answer = number1+number2/number3;

}

} else if(operator1 == 2) { // if random num is 2 operator is -

expression.append(" - ");

expression += std::to_string(number2);

if (operator2 == 1){

expression.append(" + ");

expression += std::to_string(number3);

answer = number1-number2+number3;

} else if(operator2 == 2) {

expression.append(" - ");

expression += std::to_string(number3);

answer = number1-number2-number3;

} else if(operator2 == 3){

expression.append(" * ");

expression += std::to_string(number3);

answer = number1-number2*number3;

} else{

expression.append(" / ");

expression += std::to_string(number3);

answer = number1-number2/number3;

}

} else if(operator1 == 3){ // if random num is 3 operator is *

expression.append(" * ");

expression += std::to_string(number2);

if (operator2 == 1){

expression.append(" + ");

expression += std::to_string(number3);

answer = number1*number2+number3;

} else if(operator2 == 2) {

expression.append(" - ");

expression += std::to_string(number3);

answer = number1*number2-number3;

} else if(operator2 == 3){

expression.append(" * ");

expression += std::to_string(number3);

answer = number1*number2*number3;

} else{

expression.append(" / ");

expression += std::to_string(number3);

answer = number1*number2/number3;

}

} else{

expression.append(" / "); // if random num is other than 1 ,2,3 operator is /

expression += std::to_string(number2);

if (operator2 == 1){

expression.append(" + ");

expression += std::to_string(number3);

answer = number1/number2+number3;

} else if(operator2 == 2) {

expression.append(" - ");

expression += std::to_string(number3);

answer = number1/number2-number3;

} else if(operator2 == 3){

expression.append(" * ");

expression += std::to_string(number3);

answer = number1/number2*number3;

} else{

expression.append(" / ");

expression += std::to_string(number3);

answer = number1/number2/number3;

}

}

  

expression.append(" = ");

cout << expression <<endl;

  

return answer;

}

int main(){

cout<<"Welcome to Math Friend, the best math game ever made. You will be presented with a series of questions that will be required to answer. You have 60 seconds to answer as many questions as possible and your time will start now" <<endl;

char choice = 'y';

int correctQuestions = 0; // variable for correct questions

int totalQuestions = 0; //variable for total questions

int answer;

int userAnswer;

bool isTimeElasped = false;

while (choice == 'y') { // keep on running till user enters y

answer = generateEasyQuestion(); // generate easy question first

totalQuestions = 0;

correctQuestions = 0;

isTimeElasped = false;

auto start = std::chrono::high_resolution_clock::now(); // start timer

while(!isTimeElasped){ // if time elapsed is less than 60 keep on going

totalQuestions++;

cin >> userAnswer; // get user anser

bool response = false;

if(answer == userAnswer){ // if answer is correct generate difficult question and increase correct question count

correctQuestions++;

cout<< "Correct!"<<endl;

response = true;

}else{ // if answer is icorrect generate an easy question

cout<<"Incorrect!"<<endl;

}

  

// Record finish time

auto finish = std::chrono::high_resolution_clock::now();

std::chrono::duration<double> elapsed = finish - start;

if (elapsed.count() >= 60){

isTimeElasped = true; // if 60 seconds are elapsed

} else{

int remainingTime = ((60 - elapsed.count()));

cout<< remainingTime << " seconds remaining" <<endl;

if(response){

   answer = generateDifficultQuestion();

}else{

answer = generateEasyQuestion();

}

}

}

//show data to output

cout<<"Time has elapsed"<<endl;

cout<<"You reached question "<<totalQuestions<<endl;

cout<<"Correct Responses: " <<correctQuestions<<endl;

cout<<"Incorrect Responses: "<< (totalQuestions-correctQuestions)<<endl;

cout<<"Would you like to play again(y/n)?"<<endl;

cin>>choice;

}

cout <<" Thankyou for playing...";

  

  

}