为什么在 c++ 的调试控制台中的 vs 代码中打印了数字？

Question

I am printing a maze and it works but sometimes this number comes up or maybey a few, this is the code en_route is a 2d array of bools

    std::cout << std::endl;
    std::cout <<".";
    for(int j=0;j<y;j++,std::cout<<".\n.")
        for(int i=0;i<x;i++)
            if(en_route[i][j])      std::cout << "*";
            else                    std::cout << " ";
    std::cout << std::endl;

odd circle with number in code

also unrelated this 2 or another number shows up later on any idea?

.**********.
.*****  ***.
.***    ***.
2
.       *  .
.       ** .
. ***  *** .
.** ****** .
.*  *******.
.** *    **.
.

Answer 1

As written in the comments. This is not an output, but the same line was output twice in a row, so it is displayed together on the display side.
Since it is twice, "2" is displayed.
Using the "Terminal" instead of the "Debug Console" will solve the problem.