What is the meaning of "close graph" and "init window" not being declared in this scope, along with "getch"?

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"Close graph" and "init window" are graphics functions used in some programming languages like C and C++. These functions allow you to initialize a graphics window and close it respectively. If they are not declared in scope, it means that they have not been properly defined or included in the code.

Similarly, "getch" is a function that is used to read a single character from the keyboard. If it is not declared in scope, it means that it has not been properly defined or included in the code. This can cause compilation errors and prevent the program from running correctly.