- Fractal(3.4.1)
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C - Fractal(3.4.1)
Time Limit:1000MS Memory Limit:30000KB 64bit IO Format:%I64d & %I64uDescription
A fractal is an object or quantity that displays self-similarity, in a somewhat technical sense, on all scales. The object need not exhibit exactly the same structure at all scales, but the same "type" of structures must appear on all scales.
A box fractal is defined as below :
Your task is to draw a box fractal of degree n.
A box fractal is defined as below :
- A box fractal of degree 1 is simply
X - A box fractal of degree 2 is
X X
X
X X - If using B(n - 1) to represent the box fractal of degree n - 1, then a box fractal of degree n is defined recursively as following
B(n - 1) B(n - 1) B(n - 1)B(n - 1) B(n - 1)
Your task is to draw a box fractal of degree n.
Input
The input consists of several test cases. Each line of the input contains a positive integer n which is no greater than 7. The last line of input is a negative integer −1 indicating the end of input.
Output
For each test case, output the box fractal using the 'X' notation. Please notice that 'X' is an uppercase letter. Print a line with only a single dash after each test case.
Sample Input
1234-1
Sample Output
X-X X XX X-X X X X X XX X X X X X X X XX X X X X XX X X X-X X X X X X X X X X X XX X X X X X X X X X X X X X X X X XX X X X X X X X X X X XX X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X XX X X X X X X X X X X XX X X X X X X X X X X X X X X X X XX X X X X X X X X X X XX X X X X X X X-#include <iostream> #include <string> #include <cstring> #include <cmath> using namespace std; #define M 1000 char s[M][M]; void print( int n, int x, int y) { int m;//m 表示方盒子规模 即边长 double t=3; if( n == 1 ) { s[x][y] = 'X'; //回溯,当n=1时,为(x,y)坐标赋值'X' return ; } else if( n > 1 ) { m = pow( t, n - 2 ); //计算盒子规模 print( n - 1, x, y ); //左上角第一个图形进行递归打印,第一个图形左上角坐标为(x,y) print( n - 1, x, y + 2 * m ); //右上角第二个图形进行递归打印,第二个图形左上角坐标为(x,y+2*m) print( n - 1, x + m, y + m ); //中间第三个图形进行递归打印,第三个图形左上角坐标为(x+m,y+m) print( n - 1, x + 2 * m, y ); //左下角第四个图形进行递归打印,第四个图形左下角坐标为(x+2*m,y) print( n - 1, x + 2 * m, y + 2 * m);//右下角第五个图形进行递归打印,第五个图形右下角坐标为(x+2*m,y+2*m) } } int main() { int n, i, p; double t=3; while(cin >> n && n != -1 ) { p = pow( t, n - 1 ); //计算方盒子规模 for( i = 0; i < p; i++ ) //对数组进行初始化 { memset( s + i, ' ', p ); //每一行均初始化为空格 s[i][p] = '\n'; //每一行最后一列初始化为换行,如果不这样做,会出错,图形无法输出 } print( n, 0, 0 ); //从左上角(x,y)坐标开始打印 for( i = 0; i < p; i++) cout << s[i] ; //输出图形 cout << '-' << endl; } return 0; }
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