Write a program in C that takes a MIPS Assembly Language (MAL) program as an input and gives a list of labels of the MAL program used as variables, a list of labels of the MAL program used for the flow control, or both as an output.

The program must run by being given command line arguments (int main(int argc, char* argv[]). So, supposing the executable version of the program is called example.out. The program will be executed with the following command: example.out flag inputfile outputfile

Note that a valid flag argument is one of -f, -v, or -b.

The program guidelines:

- if the flag is -v, the program should only produce a list of labels of the MAL source program used as variables in the specified output file.(Variable labels are identifiers defined in the .DATA segment of a MAL program.)

- if the flag is -f, the program should produce only a list of labels of the MAL program used for the flow control in the specified output file. (Flow control labels are identifiers defined in the .TEXT segment of a MAL program.)

- if the flag is -b, the program must produce a.) a list of labels of the MAL source program used as variables, and b.) a list of labels of the MAL program used for the flow control in the specified output file.