/in/foo.c: In function 'main':
/in/foo.c:18:6: warning: the address of 'isPrime' will always evaluate as 'true' [-Waddress]
   if(&&isPrime(i)&&n%i==0){printf("%d\n",i);break;}
      ^~
/in/foo.c:18:15: error: expected ')' before '(' token
   if(&&isPrime(i)&&n%i==0){printf("%d\n",i);break;}
               ^
/in/foo.c:18:3: error: label 'isPrime' used but not defined
   if(&&isPrime(i)&&n%i==0){printf("%d\n",i);break;}
   ^~