/in/lab5.c: In function 'divide':
/in/lab5.c:129:4: warning: statement with no effect [-Wunused-value]
    for(q;q < varnum;q++){
    ^~~
/in/lab5.c: In function 'assign':
/in/lab5.c:73:6: warning: 'q' is used uninitialized in this function [-Wuninitialized]
     }for(int q;q < varnum;q++){
      ^~~