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/* * Printing triangles on the console * Various methods, including recursion * Author: Danny Battison * Contact: gabehabe@hotmail.com */ #include <iostream> #include <string> /* The simplest method, using nested loops */ void triangle (int x) { for (int i = 1; i <= x; i++) { for (int j = 1; j <= i; j++) std::cout << '*'; std::cout << std::endl; } } /* A recursive method, prints the triangle upside down */ void recursiveTriangle (int y) { if (y == 0) return; for (int i = 0; i < y; i++) std::cout << '*'; std::cout << std::endl; y--; recursiveTriangle(y); } /* Another recursive method, prints the triangle the right way up, but takes 2 params */ void recursiveTriangle2 (int x, int y) { /* x is the starting value, y is the ending value (when to return) */ if (x > y) return; for (int i = 1; i <= x; i++) std::cout << '*'; std::cout << std::endl; x++; recursiveTriangle2 (x, y); } /** EXAMPLE USAGE **/ int main () { triangle(4); std::cout << std::endl; recursiveTriangle(4); std::cout << std::endl; recursiveTriangle2(1,4); std::cin.get(); return EXIT_SUCCESS; }
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