How to increase the memory storage of a C program?

[freeWill]

I am currently creating a compiler using C. I have finished lexical, syntactic
and semantic analyzer and right now, i am working on the interpreter. I am
having a hard time doing it because my program is running out of memory.
What can i do to increase the memory that my program is using?

[weaknessforcats]

What operating system are you using?