/in/foo.c: In function 'main':
/in/foo.c:9:11: error: expected ')' before 'i'
   if((int(i*b)-int(i*a))>=1){
           ^
/in/foo.c:9:15: error: expected ')' before '-' token
   if((int(i*b)-int(i*a))>=1){
               ^