prac_007.cpp (475B)
1 /* sum of natural numbers upto n */ 2 3 #include <iostream> 4 using namespace std; 5 6 class add { 7 int inp, i, a = 0; 8 9 public: 10 void input(); 11 void calc(); 12 void output(); 13 }; 14 15 void add::input() { 16 cout << "enter the number : "; 17 cin >> inp; 18 } 19 20 void add::calc() { 21 for (i = 1; i <= inp; i++) { 22 a = a + i; 23 } 24 } 25 26 void add::output() { 27 cout << "Addtion = " << a; 28 } 29 30 int main() { 31 add z; 32 z.input(); 33 z.calc(); 34 z.output(); 35 return 0; 36 }