Question

How to calculate the series 1 3 4 8 15 27 50 92 169 311 572 ... N in C++

Answer 1

// 1 3 4 8 15 27 50 92 169 311 572 ... N 
 
// (1) (3) (4) : 1 + 3 + 4 (8) : 3 + 4 + 8 (15) : 4 + 8 + 15 (27) :
// 8 + 15 + 27 (50) : 15 + 27 + 50 (92) : 27 + 50 + 92 (169) :
// 50 + 92 + 169 (311) : 92 + 169 + 311 (572)

#include <iostream>

int main()
{
    int a = 1, b = 3, c = 4, total = 11;
 
    std::cout << a << " " << b << " " << c << " ";
 
    int sum = 0;
    for (int i = 4; i <= total; i++) {
        sum = a + b + c;
         std::cout << sum << " ";
 
        a = b;
        b = c;
        c = sum;
    }
 
    return 0;
}
 
 
 
/*
run:
 
1 3 4 8 15 27 50 92 169 311 572 
 
*/

 

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