Write a program to be used as a calculator. It should be able to add(+), subtrac

Question

Write a program to be used as a calculator. It should be able to add(+), subtract(-),multiply(*),divide(/),to find remainder of integer division(%),exponent(e),and square root (s) of numbers.

The user enters inputs in the form:operator,number,(number);where the second number is not required for the exponent or square root. For example, if the user enters +5 4,then the program prints out 9; or if the user enters s 64, the program prints out 8.

Test your program for a wide range of possible inputs including division by zero and square root of negative values.

submit the source code and properly formatted output.

Explanation / Answer

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#include <iostream>
#include <math.h>                
using namespace std;
int main()                       
{
         char oper;
         int var1 = 0, var2 = 0;
        
        cout<<"enter operation variable1 variable 2 (ex + 1 2) q to exit ";
         cin>>oper;
         while(oper!='q')
         {cin>>var1;
         if(oper!='e'&&oper!='s')
              { cin>>var2;
               cout<<var1<<" "<<oper<<" "<<var2<<" = ";
               }
         else
              cout<<oper<<" "<<var1<<" = ";
         switch(oper)
         {case '+':cout<<var1+var2;
                   break;
          case '-':cout<<var1-var2;
                   break;
          case '*':cout<<var1*var2;
                   break;
          case '/':if(var2==0)
                      cout<<"undefined";
                    else
                      cout<<(double)var1/var2;
                   break;
          case '%':if(var2==0)
                      cout<<"undefined";
                    else
                      cout<<var1%var2;
                   break;        
          case 'e':cout<<exp(var1);
                   break;
          case 's': if(var1<0)
                        cout<<"answer is imaginary ";
                    else
                        cout<<sqrt(var1);
                  break;
          default: cout<<"Invalid operator";
         
          }
          cout<<endl;
          cout<<"enter operation variable1 variable 2 (ex + 1 2) q to exit ";
         
          cin>>oper;
          }
               
return 0;                    
}

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