prac_007.cpp (611B)
1 /* 2 * Author: Amit Dutta (amitdutta4255@gmail.com) | Date: 22 Jun 2026 3 * Repo: https://github.com/notamitgamer/bsc 4 * License: MIT 5 */ 6 7 /* sum of natural numbers upto n */ 8 9 #include <iostream> 10 using namespace std; 11 12 class add { 13 int inp, i, a = 0; 14 15 public: 16 void input(); 17 void calc(); 18 void output(); 19 }; 20 21 void add::input() { 22 cout << "enter the number : "; 23 cin >> inp; 24 } 25 26 void add::calc() { 27 for (i = 1; i <= inp; i++) { 28 a = a + i; 29 } 30 } 31 32 void add::output() { 33 cout << "Addtion = " << a; 34 } 35 36 int main() { 37 add z; 38 z.input(); 39 z.calc(); 40 z.output(); 41 return 0; 42 }