How to set global variables in c++

#c How to set global variables?

1. First, define a custom function that implements addition operation.

#2. Next, define a custom function that implements multiplication.

#3. Finally, implement the program operations in the main function.

#4. Variables defined outside a function that are not enclosed in curly braces are called global variables. The scope of a global variable starts from the location where the variable is defined and ends at the end of the file.

#5. If multiple functions in a program have to process the same variable, you can define this variable as a global variable, such as the custom function in this example Both product and main function use global variables.

#6. Run the program and you can see that global variables have an effect on any function located behind the global variable definition in the file.

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