I$\text{'}$m $$writing call functions for a$$C$++$program$,$ please follow the following requirements to $$complete these four call functions on $$the basis of $$the existing code, thank you very much.

Actually, the composition of $$this txt $$file is $$like this, the first line will have two numbers m $$and n$$to $$tell you that this map is $$a square of$$m$$n

The next line starts with the content of $$the map itself, and when the content of $$the map ends, the last line is $$the letters wasd in $$a certain order, telling you that the ship F $$will move one block at $$a time in $$the order of $$movement of$$up$($w$),$down $($s$),$left $($a$),$and right $($d$).$

In $$this function, you need to $$load the map from a text file called map.txt $$and initialize variables ship and boss. Notably, map could be $$modified here.

A map text file should contains a matrix of $$characters of $$size rows $$cols. The character in $$each cell should be $$either $.,$F$,$E$,$R$$or$$B$.$

F $$stands for your spaceship's starting position.

E $$stands for the enemy position, which will deduct your game score $10$when you hit it$.$When your ship leaves the E $$sector$,$ it $$will become an$$X $$zone$,$ indicating that the enemy have been defeated. It$$is $$denoted by $$the letter $"$X$".$

R $$stands for the resource position, which will increase your game score $20$when you hit it$.$When your ship leaves the R $$sector$,$ it $$will become an$$X $$zone$,$ indicating that the resources have been exhausted. It$$is $$denoted by $$the letter $"$X$".$

B $$stands for the boss position, which you must defeat it $$with enough points. When you hit the boss, the game will over.

$.$is $$a placeholder, which means there is $$nothing at $$that position.

An $$example map file of $$size $55$should look like this$$

$55$

$.$ R $.$ E $.$

$..$ F $..$

$.$ B $.$ R $.$

$....$ E

wasdss

Other codes are shown in the images