Question

The use of computers in education is referred to as computer-assisted instruction (CAI). More sophisticated CAI systems monitor the student’s performance over a period of time. The decision to begin a new topic is often based on the student’s success with previous topics. Modify the c++ program which I included to count the number of correct and incorrect responses typed by the student. After the student types 5 answers, your program should calculate the percentage of correct responses. If the percentage is lower than 75 percent, your program should print “Please ask for extra help” and then terminate. If the percentage is 75 percent or higher, your program should print “Good work!” and then terminate.

#include<bits/stdc++.h> //headerfile
using namespace std;
int main(){
int cont=0;
while(cont<5){ //we will come out of loop when we get 5 correct answers
// This program will create different sequence of
// random numbers on every program run because of srand
   srand(time(0));
int x=rand()%10; //we took modulo 10 because all numbers should be between 0 to 9
int y=rand()%10;
cout<<"How much is "<<x<<"*"<<y<<"?"<<endl;
  
int out;
int res=x*y;//actual output
cin>>out; //we enter the result as output
if(res==out){ //if actual output matches our solution
   cout<<"Very good!"<<endl;
cont++;
}else{ //if actual output doesn't match our solution
while(res!=out){ //we will repeatedly ask the user same question till we get answer
   cout<<"No. Please try again."<<endl;
cout<<"How much is "<<x<<"*"<<y<<"?"<<endl;
cin>>out;
}
cont++;
}   
}
}

Answer 1

#include<bits/stdc++.h> //headerfile
using namespace std;
int main(){
   int cont=0;
   int incorrect = 0,correct = 0; // to count correct and incorrect
   while(cont<5){ //we will come out of loop when we get 5 correct answers
       // This program will create different sequence of
       // random numbers on every program run because of srand
       srand(time(0));
       int x=rand()%10; //we took modulo 10 because all numbers should be between 0 to 9
       int y=rand()%10;
       cout<<"How much is "<<x<<"*"<<y<<"?"<<endl;
       int out;
       int res=x*y;//actual output
       cin>>out; //we enter the result as output
       if(res==out){ //if actual output matches our solution
           cout<<"correct"<<endl;;
           correct++;
       }else{
           cout<<"wrong"<<endl;
           incorrect++;
       }   
       cont++;   
   }
   double percent = ((double)correct/(correct+incorrect))*100; // check correct %
   if(percent>=75){
       cout <<"Good work!";
   }else{
       cout<<"Please ask for extra help";
   }
}

/* OUTPUT */

/* PLEASE UPVOTE */