char x[4][4];
        for (i = 0; i < 4; i++){
            for (j = 0; j < 4; j++){
                x[i][j] = 'x';
            }
        }
int u=1,v=2,m=2,d=3;
int w=2;
int y=4;
for (i = 0; i < 4; i++){
                for (j = 0; j < 4; j++){
                    if (j != 3){
                        if (i == u && j == v){
                            printf("%d ", w);
                        }
                        if (i == m&&j == d){
                            printf("%d ", y);
                        }
                        else
                        {
                            printf("%c ", x[i][j]);
                        }
                    }
                    if (j == 3){
                        if (i == u && j == v){
                            printf("%d ", w);
                            printf("\n");
                        }
                        if (i == m&&j == d){
                            printf("%d ", y);
                            printf("\n");
                        }
                        else{
                            printf("%c ", x[i][j]);
                            printf("\n");
                        }
                    }
                }
这是我写的部分程序，我想让它输出
x x x x
x x 2 x
x x x 4
x x x x
但是我输出的情况是这样的
x x x x
x x 2 x
x x x 4
x
x x x x
这是为什么的，请给位解答，谢谢各位