Question 100: 1 + 2 + ...... Sum of N (abnormal level limit)

# Include <iostream> using namespace STD; Class temp {public: // construct temp () {++ N; sum + = n ;}// reset static void reset () {n = 0; sum = 0;} // return and static int getsum () {return sum;} PRIVATE: static int N; static int sum;}; int temp :: n = 0; int temp: Sum = 0; int sum (int n) {temp: reset (); temp * A = new temp [N]; delete [] A; A = NULL; return temp: getsum ();} void main () {cout <sum (10) <Endl ;}

Restriction: multiplication and division are not allowed. For, while, if, switch, case are not allowed. conditional expressions are not supported ....

This method uses the New Keyword to automatically call the constructor, so that the sum operation can be placed in the constructor, and the static member variable belongs to a class instead of an object, the constructor is accumulated every time it is called.