/* ############# USAGE EXAMPLE ############# Enter positive integer for the pyramid's height. Optionally, customize the pyramid background, stroke and fill character. (Inspired by @KrOW) For example: 10 #*- Draw 10 rows, with background character (#), stroke (*), fill (-) ######################################### [Challenge Link] https://www.sololearn.com/Discuss/1063426/?ref=app [Description] Draw pyramid with only a single loop © 2018 SoloLearn Community */ #include #include // Main procedure int main() { int height {5}; // Get pyramid height std::cout << "Enter pyramid height: "; std::cin >> height; if(height < 2) height = 2; std::cout << height << "\n\n"; std::cin.ignore(); int b = height - 1, c = 1, last = b; // Default values for background, stroke and fill // Inspired by @KrOW char BSF[4] = "C++"; // Allow user to define background, stroke or fill std::string opt; std::cin >> opt; for(std::size_t idx = 0; idx < 3; idx++) if(opt.length() > idx) BSF[idx] = opt.at(idx); std::string M(b, BSF[0]), X(b * 2 + 1, BSF[2]); for(int row = 0; row < height; row++) { if(row == last) std::cout << std::string(X.length(), BSF[1]); // bottom row else { if(b) std::cout << M.substr(0, b); // background if(row) { std::cout << BSF[1] << X.substr(0, c) << BSF[1]; // stroke, fill, stroke c += 2; } else { std::cout << BSF[1]; // stroke } if(b) std::cout << M.substr(0, b); // background } b--; std::cout << "\n"; } return 0; }

Challenge - 1 Loop Pyramid