Finish the function in Pa2.cpp , It must use recursion to write the function.File: func.h * Header file for global constants, */// Please do not change this file.#include <iostream>// Constantsconst int MAX_ROW = 20;const int MAX_COL = 40;const char NULL_CHAR = ‘ ‘;const char HYPHEN = ‘-‘;const char BAR = ‘|’;const char SLASH = ‘/’;const char BACKSLASH = ”;const char DOT = ‘.’;const char UNDERSCORE = ‘_’;const char CROSS = ‘X’;const char PLUS = ‘+’;// User-defined enum type for represent different shapesenum Shape {TRIANGLE, HIVE, VERTICAL, HORIZONTAL, UPWARD_SLANTING_LINE, DOWNWARD_SLANTING_LINE, NONE};/* Function Given */// This function is used for printing out
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