I am a beginner in C++ programming. I was trying to make a Sudoku solver by Brute Force, but I just cant seem to figure out whats amiss.

I have tried to assign random unique numbers to each row and each column. Theoretically, by using unrelated random numbers, this is bound to give me a solution for the sudoku.

Can someone help me make this thing work ?

Code:#include <iostream.h> #include <conio.h> #include <stdlib.h> #include <time.h> void main() { srand(time(NULL)); int arr[9][9]; int full[9][9]; cout << "INSTRUCTIONS!"; cout << endl << "Enter the initial Sudoku square"; cout << "\\nEnter the numbers where they appear, or enter 0 if there is a blank space\n\n"; //counters int i=0,j=0; for(i=0;i<9;i++) { for(j=0;j<9;j++) { full[i][j]=0; cout << "Enter the element at " << (i+1) << "," << (j+1) << ": "; cin >> arr[i][j]; if(arr[i][j]!=0) full[i][j]=1; } } clear1: clrscr(); for(i=0;i<9;i++) { for(j=0;j<9;j++) { cout << arr[i][j] << "\t"; } cout << endl; } for(i=0;i<9;i++) { for(j=0;j<9;j++) { if(full[i][j]==0) { int x= random(1000); x=(x%9)+1; arr[i][j]=x; } } } clrscr(); //horizontal check for(i=0;i<9;i++) { int flag=1; for(j=0;j<9;j++) { for(int J=(j+1);J<9;J++) { if(arr[i][j]==arr[i][J]) goto clear1; } } } //vertical check for(j=0;j<9;j++) { int flag=1; for(i=0;i<9;i++) { for(int I=(i+1);I<9;I++) { if(arr[i][j]==arr[I][j]) goto clear1; } } } //subgrid check // to be implemented after horizontal+vertical checks are done for(i=0;i<9;i++) { for(j=0;j<9;j++) { cout << arr[i][j] << "\t"; } cout << endl; } getch(); clrscr(); }