我想用c ++初始化一个数独板（9 * 9）。得到一个空白的屏幕，闪烁的光标作为输出。 [英] i'm tring to initialise a sudoku board (9*9) using c++.getting a blank screen with blinking cursor as output.

问题描述

#include <iostream>
#include<ctime>
#include<cstdlib>
using namespace std;


// here array board[][] is declared to be a global variable
int board[9][9];


/* this function returns a random number in the specified range(excluding the upper   limit)
   in this program,returns random number between 0 and 8 */
    
int randrange(int low,int high)
{
    return rand()%(high-low)+low;
}
   
    
bool check(int num,int row,int col)
{
    int i;
    //  checks if number is repeated in that row or not

    for(i=0;i<9;i++)
    {
         if(board[row][i]==num)
         {
             return false;
         }
    }
   
    //  checks if number is repeated in that column or not
    for(i=0;i<9;i++)
    {
        if(board[i][col]==num)
        {
            return false;
        }
    }
    return true;
}


/*  this function checks if that particular element in the array 'board' is already   assigned
    a value or not */
 
bool non_empty(int row,int col)
{ 
    //0 is default value
    
    if(board[row][col]==0) 
        return true;
     
    //  true indicates unassigned element
    else return false;
       
    // false indicates an element which is already assigned a value
}
 
// a class handiling all the inintialisation part of the board
class initialisation
{
private:
    int num,i,j,row,col;
    bool flag=true;

public:
    void _initialisation();
    void display();
};
 
void initialisation::_initialisation()
{
    // in the for loop below ,numbers from 1 to 9 are assigned to the array board[][]

    //the row and column index are chosen at random
    for(num=1;num<=9;num++)
    {
        flag=true;
      
        for(i=0;i<9;i++)
        {
            do
            {
                row=randrange(0,9);
                col=randrange(0,9);

           /* in this if statement we perform calls to two functions
           non_empty(row,col) returns true only if that element in the
           array board is not assigned a value earlier,if not returns false.
           check(num,row,col) returns true only if that particular number 'num' is not
            repeated in that row and column */
     
                if(non_empty(row,col)&&(check(num,row,col)==true))
                {
                    flag=true;
                    board[row][col]=num;
                }
                else
                    flag=false;
            }  while(flag==false);
         
        }
    }  
}

//this method displays the elements in array board[][]
void initialisation::display() 
{
    for(i=0;i<9;i++)
    {
        for(j=0;j<9;j++)
            cout<<board[i][j]<<" ";
        cout<<endl;
    }
}
    

//main function starts here
   
int main()
{
    srand(time(NULL));
  
    // we create an object of the class initialisation

    initialisation a;
  
    // we call two methods of the class initialisation below

    a._initialisation();

    a.display();

    return 0;
}

推荐答案

你没有问过一个问题，所以我只能帮助解决一个但很重要的问题。关于你的主要问题是硬编码立即常量 9.将它声明为显式常量，否则你的代码将无法支持。

-SA

You did not ask a single question, so I can only help with one but important fix. On of your major problems is hard-coding the immediate constant 9. Declare it as an explicit constant, otherwise your code would be unsupportable.

—SA

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