/in/lab5.c: In function 'trans':
/in/lab5.c:85:5: warning: unused variable 'n' [-Wunused-variable]
 int n=0;
     ^
/in/lab5.c: In function 'calculate':
/in/lab5.c:76:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^