invalid lvalue in assignment... Shut the Box Program

[PhysKid]

Hi, am trying to program Shut the Box (http://en.wikipedia.org/wiki/Shut_the_Box). when I decide which tile to flip, I get the error " invalid lvalue in assignment". I've looked this up and it's usually because you need == instead of =, but I am assigning the value 1 to the array element... So I can't figure it out.... I will take some of it out so you can read it easier.

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "random.hpp"
 
int main(int argc, char* argv[]){
  if (argc!=3) printf("please enter: shut <#tiles> <#games to run>\n");
 int numTiles= atoi(argv[1]);
 int numGames= atoi(argv[2]);
int tiles[numTiles];
int die1, die2, dietotal;
int score=0, highscore=0, lowscore=0, medianScoreTot=0;
 
 printf("no tiles: %d, games: %d \n", numTiles, numGames);
 
 
for (int j=0;j<numTiles;j++){ //init the tiles: 0 is up, 1 is down
tiles[j]=0;
}
 
for (int i=0; i<numGames; i++){ //begin a new game
die1= randui(1, 6);
die2= randui(1, 6);
dietotal=die1+die2;
 
 printf("die1: %d, die2: %d, total: %d \n", die1, die2, dietotal);
 
//*******************************************
//lowst firstfor (int k=1; k<dietotal+1;k++){
 if (dietotal==2){
tiles[2]=1;
 }else if (dietotal==3){
int rand= randui(1, 2);
  if (rand==1){ 
    tiles[3]=1;
  }else tiles[1]=1 && tiles[2]=1;  //**the ERROR comes here
 }
 
 else if (dietotal==4){ //************* 
int rand= randui(1, 3);
  if (rand==1){ 
    tiles[4]=1;
  }else if (rand==2){
 tiles[3]=1 && tiles[1]=1;  //**the ERROR comes here
  }else tiles [2]=1;  
}    
 
 else if (dietotal==5){ //************* 
int rand= randui(1, 3);
  if (rand==1)tiles[5]=1;
 else if (rand==2) tiles[4]=1 && tiles[1]=1; 
 else tiles[3]=1 && tiles[2]=1;   //**the ERROR comes here
 }
 else printf("there was an error. your sum was not 2-12\n");
 
}//end loooop for no games.
 
// print the tile  array to see which were turned.
for (int l=1;l<numTiles+1 ;l++){ //init the tiles: 0 is up, 1 is down
  printf("tile[%d]: %d /n", l, tiles[l]);
}
//****************
 return 0;
}
 
 

[Rabbit]

tiles[3]=1 && tiles[2]=1

This doesn't make any sense. Why are you boolean ANDing 1 with tiles[2]?

I think you meant to do the assignment separately.

else {
   tiles[3] = 1;
   tiles[2] = 1;
}