/in/foo.c: In function 'main':
/in/foo.c:13:11: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
   scanf("%d",card[i]);
           ^
/in/foo.c:14:4: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
   M+=card;
    ^~