/in/foo.c: In function 'main':
/in/foo.c:6:13: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
     scanf("%d %d",a,b);
             ^
/in/foo.c:6:16: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
     scanf("%d %d",a,b);
                ^
/in/foo.c:6:5: warning: 'a' is used uninitialized in this function [-Wuninitialized]
     scanf("%d %d",a,b);
     ^~~~~~~~~~~~~~~~~~
/in/foo.c:6:5: warning: 'b' is used uninitialized in this function [-Wuninitialized]