In the below program, how do u make it so the subtraction anddivision part wont

Question

In the below program, how do u make it so the subtraction anddivision part wont be a decimal or a negative number?

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <cmath>

using namespace std;

void add ();
void subtract ();
void multiply ();
void divide ();
double getnums (double&, double&,char);
void compare(double,double);
int main()
{

//double num, num1, num2;
char choice;

for (;;){
     do {

cout << "***Calulator***" <<endl;
cout << "Please choose an option by entering the number, toexit the program press q." <<endl;
cout << "1 - Addition" <<endl;
cout << "2 - Subtraction" <<endl;
cout << "3 - Multiplication" << endl;
cout << "4 - Division" <<endl;
cout << "q - Quit the program"<<endl;
cin >> choice;

} while ((choice < '1' || choice > '4') && choice !='q');
if (choice == '1'){
   add();}
else if (choice == '2')
     subtract();
else if (choice == '3')
     multiply();
else if (choice == '4')
     divide();
if (choice == 'q'){
     cout<<endl; break;}

//cout << num <<endl;


}

}

void add (){
       double num,ans;
       double num1,num2;      
      ans=getnums(num1,num2,'+');
       num = num1 + num2;
       compare(num,ans);
       return ;}
      
      
void subtract (){
       double num,ans;
       double num1, num2;
      ans=getnums(num1,num2,'-');
       num = num1 - num2;  
       if(num < 0)
          ans=getnums(num1,num2,'-');
       num = num1 - num2;
       
       compare(num,ans);
      
       return ;}
      
void multiply (){
       double num,ans;
       double num1, num2;
      ans=getnums(num1,num2,'*');
       num = num1 * num2;
       compare(num,ans);
       return ;}
      
void divide (){
       double num,ans;
    
       double num1, num2;
      ans=getnums(num1,num2,'/');
       num = num1 /num2;      
       compare(num,ans);
       return ;}
double getnums(double &n1, double &n2,char op)
       {double ans;
      n1=rand()%20+1;
      n2=rand()%20+1;
      cout<<"What is"<<n1<<" "<<op<<" "<<n2<<":";
      cin>>ans;
      return ans;
     }      
void compare(double a,double b)
   {if(a==b)
       cout<<"Great - you gotthe rigt answer!! ";
    else
       cout<<"I'm sorry - thecorrect answer is "<<a<<endl;
    return;
    }
     

Explanation / Answer

please rate - thanks try this and get back to me - changes in red #include #include #include #include using namespace std; void add (); void subtract (); void multiply (); void divide (); double getnums (double&, double&,char); void compare(double,double); bool check(double,double); int main() { //double num, num1, num2; char choice; for (;;){      do { cout

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.