Programming algorithm: Find 1+2+...+n (constructor) code (c + +)

Title: Seek 1+2+...+n, the request cannot use multiplication and division method \for\while\if\else\switch\case and so on key word and Condition judgment statement (A? B:C).

You can use constructors, loop solver, use arrays to construct multiple classes, and use static variables of classes to store data.

Code:

* * * * * main.cpp * * *  Created on:2014.7.12 * 
 This column more wonderful content: http://www.bianceng.cnhttp:// www.bianceng.cn/Programming/sjjg/
 *      author:spike 
 /
      
#include <stdio.h>  
#include < stdlib.h>  
#include <string.h>  
#include <math.h>  
      
using namespace std;  
      
Class Temp {public  
:  
    temp () {++n; Sum+=n;}  
    static void Reset () {n=0; sum=0;}  
    Static size_t Getnum () {return Sum;}  
Private:  
    static size_t N;  
    static size_t Sum;  
      
size_t temp::n = 0;  
size_t temp::sum = 0;  
      
size_t Sum (size_t N) {  
    temp::reset ();  
    temp* a = new temp[n];  
    Delete[] A;  
    A = NULL;  
    return Temp::getnum ();  
}  
      
int main (void)  
{  
    size_t result = Sum;  
    printf ("result =%d\n", result);  
    return 0;  
}

Output:

result = 55

Author: csdn Blog Caroline-wendy