The statement is this one:

-Write a program in RISC-V assembly using RARS. The program should not rely on uninitialized register values. The program should not contain any obviously inefficient actions. Do NOT use multiply/divide instructions for multiplication division by constants being powers of 2. Avoid the sequences of consecutive branches, esp. conditional branches followed by unconditional ones (unless necessary). All the text processing programs with file i/o should define getc and putc functions for single-character i/o, providing proper buffering of input and input operations with at least 512-byte buffers.

• Collect all the identifiers from a valid C program and determine the minimum number of characters required to preserve their uniqueness. Produce the replacement list and display it. Assume that the minimum length of a modified identifier is equal to or greater than the maximum length of a C language keyword.

I am very new in RISC V so I don't really know how could I get the identifiers of a C language program (.c) from a RISCV program. Thank you very much!