/in/foo.c: In function 'digui':
/in/foo.c:15:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'main':
/in/foo.c:46:29: warning: 'min2' may be used uninitialized in this function [-Wmaybe-uninitialized]
    a[h1].c=a[min1].c+a[min2].c;
                      ~~~~~~~^~
/in/foo.c:42:6: warning: 'min1' may be used uninitialized in this function [-Wmaybe-uninitialized]
    vi[min1]++;
    ~~^~~~~~