stairs_pattern.cpp

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#include <iostream>
 
int main() {
    int l, st = 2, x, r, z, n, sp;
    std::cout << "Enter number of pair - ";
    std::cin >> x;
    z = x;
    for (r = 1; r <= x; r++) {
        z = z - 1;
        for (n = 1; n <= 2; n++) {
            for (sp = 1; sp <= z; sp++) {
                std::cout << " ";
            }
            for (l = 1; l <= st; l++) {
                std::cout << "\\*";
            }
            std::cout << std::endl;
        }
        st = st + 2;
    }
}