/in/foo.cc: In function 'void init(int*)':
/in/foo.cc:8:23: warning: 'sizeof' on array function parameter 'a' will return size of 'int*' [-Wsizeof-array-argument]
    memset(a,0,sizeof(a));                  
                       ^
/in/foo.cc:5:17: note: declared here
 void init(int a[]) { 
                 ^
/in/foo.cc:8:21: warning: argument to 'sizeof' in 'void* memset(void*, int, size_t)' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess]
    memset(a,0,sizeof(a));                  
                     ^