A.int sum(int,int,int,int) B.int sum(int,int,int) C.int sum(double) D.int sum(double,double,double);
A.reverse(a,a+Len); B.sort(a,a+Len); C.find(a,a+Len,value); D.copy(a,a+Len,b);
A., B.; C.: D..