[Dev-C++] Another problem.. this time logic is the problem.

[Mansoor N. <man...@sy...>]

Hi, this is an extract of a problem directly given to me by my teacher,
without an explanation.

Any help solving it would be greatly appreciated.

Mansoor:




Structured Sums Problem

Using in order only the digits 3 through 7 to form numbers, and the
operations + and - to combine those numbers, find all possible
combinations totalling a given value.  Each digit may be used only
once in forming the numbers.  For example, if the total were to be
25, your program should find these two possibilities:

 +3+4+5+6+7
 +3-45+67

Your program should ask for the desired total, and then list those
combinations (if any) yielding that total.