Question

I have the following C++ code and when I compile it I get the “Lvalue required” error. Please point out where I’m going wrong. Thanks.

#include <iostream.h>
#include <conio.h>
void main()
{
  clrscr();
  char r[5];
  int mark;
  cout<<"Please enter your goddamn marks";
  cin>>mark;
  r=mark>=35?"pass":"fail";
  cout<<"\n"<<r;
}

Answer 1

The problem is here:

r=mark>=35?"pass":"fail";

You cannot assign a string literal to a char array. You have several options:

• use strcpy() instead of assignment;
• change r to be of type const char*;
• change r to be of type std::string.

The last option is by far the best.