Question

我正在开发一个基于用户输入的高度和分形水平打印Sierpinski三角形的程序。这是我的程序应该生成的高度为8和分形级别1的输入：

#include <stdio.h>
#include <stdlib.h>

int main(int argc, const char *argv[]) {

    int height, draw, errno, fractal_level;

    char *p;
    char *q;
    errno = 0;
    height = strtol(argv[1], &p, 10);
    fractal_level = strtol(argv[2],&q, 10);
    if (errno != 0 || p == argv[1]) {
        printf("ERROR: Height must be integer.\n");
        exit(1);
    }
    else if (errno != 0 || q == argv[2]) {
        printf("ERROR: Fractal Level must be integer.\n");
        exit(1);
    }
    int x,y;
    x=(2*height-1) / 2;
    y=(2*height-1) / 2;
    printf("x: %d   y: %d \n", x, y);
    drawSier(height, fractal_level, x, y);

    return 0;   
}

int drawSier(height, fractal_level, x, y) {

    //If the fractal level is zero, it's just a normal triangle.
    if (fractal_level==0)
    {
        drawTriangle(height, x, y);
    }
    //the function calls itself, but with a slight variance 
    //in the starting point of the triangle, for the top, bottom left, and bottom right
    else {
    //top
    drawSier(height/2, fractal_level-1, x, y);
    //bottom left
    drawSier(height/2, fractal_level-1, x-height/2, y-height/2);
    //bottom right
    drawSier(height/2, fractal_level-1, x+height/2, y-height/2);
    }
}

int drawTriangle(height, x, y){

    if (height<1) {
        printf("ERROR: Height too small.\n");
        exit(1);

    }
    else if (height>129) {
        printf("ERROR: Height too large.\n");
        exit(1);
    }

    for (int i = 1; i <= height; i++)
    {
        int draw=0;

        // this 'for' loop will take care of printing the blank spaces
        for (int j = i; j <= x; j++)
        {
            printf(" ");
        }
        //This while loop actually prints the "*"s of the triangle by multiplying the counter
        //by 2R-1, in order to output the correct pattern of stars. This is done AFTER the for
        //loop that prints the spaces, and all of this is contained in the larger 'for' loop.
        while(draw!=2*i-1) {
                printf("*");
                draw++;
        }
        draw=0;
        //We print a new line and start the loop again
        printf("\n");
    }

return 0;
}

这是我到目前为止所做的：

       *
      ***
     *****
    *******
   *
  ***
 *****
*******
           *
          ***
         *****
        *******

以下是我的程序当前使用相同输入生成的内容：

{{1}}

我不确定出了什么问题。这似乎与y变量有关。

Answer 1

y已传递给drawTriangle()，但该功能并未使用它。它只是打印带有三角形的新线条，位于之前打印的内容之下。

您可以使用控制台控制代码在打印前将光标移动到所需位置（注意不要覆盖以前打印的输出），或者您可以先在内存中创建完整图像，最后只将其打印出来

Sierpinski三角调试--- C

1 个答案: