Program for printing Fibonacci Sequence in C++

#include <iostream>

int i;     
int j; 
int k;    

int main()
{
    i = 1;
    j = 1;

    std::cout << "1\n";
 
 while (j < 100) {

        std::cout << j << '\n';
        k = j + i;

        i = j;
        j = k;
    }
    return (0);
}