non-lvalue

[Nobody/Anonymous]

I get the error message: 'non-lvalue in assignment' on lines
27,34,41,48. Here is the source code:

#include <iostream>
#include <stdlib.h>

int main(int argc, char *argv[])
{
  char op;
  float a;
  float b;
  float c;

  cout<<"SimpleCalc"<<endl<<endl;
  cout<<"syntax: 1+2"<<endl;
  cout<<"Commands:"<<endl;
  cout<<"+: a+b"<<endl;
  cout<<"-: a-b"<<endl;
  cout<<"/: a/b"<<endl;
  cout<<"*: a*b"<<endl<<endl;
  cout<<"Operation>> ";  //The operation you want to preform
  cin>>op;
  cout<<"First Number>> ";
  cin>>a;
  cout<<"Second Number>> ";
  cin>>b;
 
  if(op=='+')
  {
   a+b=c;
   cout<<"Result: "<<c;
  }
  else
  {
   if(op=='-')
   {
    a-b=c;
    cout<<"Result: "<<c;
   }
   else
   {
    if(op=='/')
    {
     a/b=c;
     cout<<"Result: "<<c;
    }
    else
    {
     if(op=='*')
     {
      a*b=c;
      cout<<"Result: "<<c;
     }
    }
   }
  }
  system("PAUSE");   
  return 0;
}

[Nobody/Anonymous]

Assignment inmost computer languages goes from right to left, so I *think* what you want to write is:

c = a + b

This takes the value of b, adds it to a, and then assigns that result to c.

not

a + b = c

The last operation, as you wrote it, assigned the value of c to b, adds that value to a, then looks for a place to put the result, which you have not given, because the operation comes to sa screeching halt after the "a"

Wayne

[Nobody/Anonymous]

Thanks.

[Nobody/Anonymous]

In my best southern fired accent - "use welcome!
We aim's to please....or kill, as the case calls"

Wayne