Testing multiple boolean values in a single IF statement

I a newbie C++ programmer trying to test aruments/parameters passed to a program.

Multiple arguments can be passed to the program, however I want to test that if certain arguments are passed then other arguments become invalid.

e.g. PGM accepts arg(1) arg(2) arg(3) arg(4) arg(5) etc...

if arg(1) and arg(2) are supplied then arg(3), arg(4) and arg(5) etc... are invalid and the program should terminate with an error message if they are also supplied along with arg(1) and arg(2).

I've thought that using boolean IF tests would be a good way to check if certain values are true/false.

I searched on stackoverflow but not found an answer that encompasses exactly what i'm trying to do. If someone can point me in the right direction or suggest a far more efficient way of doing this I would be very grateful.

My code currently looks like this:

bool opt1 = false; 
bool opt2 = false;
bool opt3 = false;
bool opt4 = false;
bool opt5 = false;

  for(int i=1; i<argc; i++)   {
        char *str  = argv[i];
        if      (strcmp (str, "-opt1:")==0) {opt1 = true;}
        else if (strcmp (str, "-opt2:")==0) {opt2 = true;}
        else if (strcmp (str, "-opt3:")==0) {opt3 = true;}
        else if (strcmp (str, "-opt4:")==0) {opt4 = true;}
        else if (strcmp (str, "-opt5:")==0) {opt5 = true;}        
     }

if((opt1) && (opt2) && (~(opt3)) && (~(opt4)) && (~(opt5)) {

      ** DO SOMETHING **

   } else {

       ** DISPLAY ERROR MESSAGE AND USAGE TEXT **

   }