void maino double numl. num2 char oper while(oper!=4=') cout<< please input numbers cin>>numI>>num2 cout<< Please input your operator cin>oper; cout<<numl<<oper<<num2<< switch( oper case +: cout<<plus(numl, num2 )<<endl; break case - cout<<minus(numl, num2<<endl; break case*>: cout<<multiply (numl, num2 <<endl; break; case" /: cout<< divide(numl, num2)<<endl; breakvoid main() { cout<<“Please input numbers:” cin>>num1>>num2; cout<<“Please input your operator:”; cin>>oper; cout<<num1<<oper<<num2<<“ = ”； { switch(oper) case ‘+’: cout<<plus(num1,num2)<<endl;break; case ‘-’: cout<<minus(num1,num2)<<endl;break; case ‘*’: cout<<multiply(num1,num2)<<endl;break; case ‘/’: cout<< divide(num1,num2)<<endl;break; } } double num1, num2; char oper = ‘ ’; while(oper != ‘=’) { }