bsc

root / semester_2 / practice / prac_007.cpp

prac_007.cpp (475B)

---

 /* sum of natural numbers upto n */
 
 #include <iostream>
 using namespace std;
 
 class add {
     int inp, i, a = 0;
 
 public:
     void input();
     void calc();
     void output();
 };
 
 void add::input() {
     cout << "enter the number : ";
     cin >> inp;
 }
 
 void add::calc() {
     for (i = 1; i <= inp; i++) {
         a = a + i;
     }
 }
 
 void add::output() {
     cout << "Addtion = " << a;
 }
 
 int main() {
     add z;
     z.input();
     z.calc();
     z.output();
     return 0;
 }