Why Does My C Code Outside Functions Produce 'expected unqualified-id' Compilation Errors?

Code Outside Functions

A snippet of code has been written outside all functions, raising an error during compilation. The code, which consists of two nested loops and assignments, is designed to set values for the flow matrix. Unfortunately, attempting to compile the code results in the following errors:

error: expected unqualified-id before ‘for’
error: expected constructor, destructor, or type conversion before ‘<=’ token
error: expected constructor, destructor, or type conversion before ‘++’ tok

Explanation

The issue lies in the fact that code cannot be placed outside functions in C . Only declarations are allowed outside functions, such as declarations of global variables or function prototypes. The code in question should be placed inside a function, such as the main() function, to execute properly.

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