Need help with maze program.

I am working on a maze assignment. We are supposed to read in the text file that contains the maze, which looks like the one below, and convert it to a graph/ grid. I can get it to read in the file, but cant figure out what to do next. Any help would be appreciated. I'm not necessarily looking for code.
This is what I have so far.

Code:

int main(){
	FILE *myfile;
	char c;

	myfile = fopen("maze2.txt", "r+");

	if(!myfile){
	   printf("File not found.");
	}

	do{

		c = fgetc(myfile);
		putchar(c);
	}
	while(c!= EOF);
	fclose(myfile);
	node_t maze;
	return 0;
}

what your input file looks like?

ooooooooooo
o*********o
o*ooooooo *o
o+o*******o
ooo* ooooooo
o$o******$o
o*o*ooooooo
o********-o
ooooooooooo

The * are blank spaces
+ and - are the start and finish
$ are checkpoints

just declare 2d array of char, and two integers i and j
i=0, j=0;
using getchar() increase j, if you see '\n' -> increase i and j=0.

I'll try that , thanks.