I am trying to produce a random walk solution but I get some strange results.
The program must randomly "walk" from element to element, always going up, down, left or right by one element.
The elements visited by the program will be labeled with the letters A through Z, in the order visited.
If all four directions are blocked, the program must terminate.
Here's the code :
One strange thing that I found duting debugging is that when direction = 3 the command after the counter2++ expression that assigns a value to an 2 dimensional array is never executed.Code:#include <stdio.h> #include <stdbool.h> #include <stdlib.h> #include <time.h> int main (int argc, const char * argv[]) { // insert code here... char myArray[10][10]; char letters[26] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'}; int counter1 = 0; //row int counter2 = 0; //column int direction; //variable to hold the direction of the next move int counter = 0; srand( (unsigned)time(NULL) ); //fill myArray with dots for (int theCounter = 0; theCounter < 10; theCounter++) { for (int innerCounter = 0; innerCounter < 10; innerCounter++) { myArray[theCounter][innerCounter] = '.'; } } myArray[0][0] = letters[counter]; while (counter < 26) { //decide direction direction = rand() % 4; //picks a random direction (0 - up, 1 - down, 2 - left, 3 - right) //up case if (direction == 0) //bounders { if (counter1 == 0) { continue; } else if (myArray[counter1 - 1][counter2] == '.') { counter++; counter1--; myArray[counter1][counter2] == letters[counter]; }//end if }//outer if //down case if (direction == 1) //bounders { if (counter1 > 9) { continue; } else { counter++; counter1++; myArray[counter1][counter2] = letters[counter]; }//end if }//end outer if //left case if (direction == 2) { if (counter2 == 0) { continue; } else if (myArray[counter1][counter2 - 1] == '.') { counter++; counter2--; myArray[counter1][counter2] == letters[counter]; }//end if }//end outer if //right case if (direction == 3) //bounders { if (counter1 > 8) { continue; } else if (myArray[counter1][counter2 + 1] == '.') { counter++; counter2++; myArray[counter1][counter2] == letters[counter]; }//end inner if }//end outer if }//end while //print the grid for (int theCounter = 0; theCounter < 10; theCounter++) { for (int innerCounter = 0; innerCounter < 10; innerCounter++) { printf("%c", myArray[theCounter][innerCounter]); } printf("\n"); } }
Why is this happening?
Thank you.
