Finished typing up ex25, going to investigate exactly why a ** was used instead of * for out_string.
"Broke it and changed read_string to use fgetc instead of fscanf"
Reverting to original exercise to do extra credit

This reverts commit 743c41ec10a8a02067ef7e4b09018b8b32cd6d85.
Implemented char printing with putchar. Need to figure out how to print integers and strings.