Description: 1. the two tuple (I, J) data sequence of a path (I, J) indicating the coordinates of a point on the path.
2. mark the path in a two-dimensional array with a sign (such as number 8) and output a two-dimensional array on the screen.
3. can use a two-dimensional array maze[i][j] represents the maze, where 1<=i<=m, 1<=j<=n. The element value of the array is 0, indicating that the location is a wall and cannot pass; the element value is 1, indicating that the location is the path. Assuming departure from maze[1][1], the exit is located at maze[m][n], and the moving direction can be in 8 directions (East, Southeast, South, southwest, West, northwest, North and northeast).
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4.cpp
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