/in/foo.c: In function 'main':
/in/foo.c:5:7: error: 'i' undeclared (first use in this function)
   for(i = 0; i < num; i++)
       ^
/in/foo.c:5:7: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:3:11: warning: variable 'input' set but not used [-Wunused-but-set-variable]
 { int num,input[92]={0};
           ^~~~~