/in/foo.c: In function 'main':
/in/foo.c:4:12: error: invalid operands to binary & (have 'char *' and 'int')
  scanf("%d"&n);
        ~~~~^
/in/foo.c:9:1: warning: implicit declaration of function 'print' [-Wimplicit-function-declaration]
 print("%d",sum);
 ^~~~~