/in/foo.c: In function 'main':
/in/foo.c:8:19: warning: format '%d' expects a matching 'int' argument [-Wformat=]
    printf("%d %d %d\n",b,a);
                   ^
/in/foo.c:11:20: warning: format '%d' expects a matching 'int' argument [-Wformat=]
     printf("%d %d %d\n",c,a);   
                    ^
/in/foo.c:13:20: warning: format '%d' expects a matching 'int' argument [-Wformat=]
     printf("%d %d %d\n",a,c);
                    ^
/in/foo.c:16:19: warning: format '%d' expects a matching 'int' argument [-Wformat=]
    printf("%d %d %d\n",a,b);
                   ^
/in/foo.c:19:20: warning: format '%d' expects a matching 'int' argument [-Wformat=]
     printf("%d %d %d\n",b,c);  
                    ^
/in/foo.c:21:20: warning: format '%d' expects a matching 'int' argument [-Wformat=]
     printf("%d %d %d\n",c,b); 
                    ^