用C语言写一个七巧板程序，要求使用到libgraphics和simpleGUI

好的，下面是一个简单的七巧板程序示例，使用了libgraphics和simpleGUI库：

#include <graphics.h>
#include <simplegui.h>

void draw_board(int x, int y, int w, int h) {
    int i, j;
    int x0 = x - w / 2;
    int y0 = y - h / 2;
    int n = 7;
    int colors[7] = { RED, YELLOW, GREEN, CYAN, BLUE, MAGENTA, BROWN };
    int shapes[7][5][2] = {
        {{0, 0}, {1, 0}, {1, 1}, {1, 2}, {2, 2}},
        {{0, 0}, {1, 0}, {1, 1}, {2, 1}, {2, 2}},
        {{0, 0}, {1, 0}, {2, 0}, {2, 1}, {3, 1}},
        {{0, 0}, {0, 1}, {1, 1}, {1, 2}, {2, 2}},
        {{0, 0}, {0, 1}, {1, 1}, {2, 1}, {2, 2}},
        {{0, 0}, {0, 1}, {0, 2}, {1, 1}, {2, 1}},
        {{0, 0}, {0, 1}, {1, 1}, {2, 1}, {3, 1}},
    };

    setfillstyle(SOLID_FILL, BLACK);
    bar(x0, y0, x0 + w, y0 + h);

    for (i = 0; i < n; i++) {
        setfillstyle(SOLID_FILL, colors[i]);
        for (j = 0; j < 5; j++) {
            int px = x0 + w * shapes[i][j][0] / 4;
            int py = y0 + h * shapes[i][j][1] / 4;
            bar(px + 1, py + 1, px + w / 4 - 1, py + h / 4 - 1);
        }
    }
}

int main() {
    int w = 400, h = 400;
    int x = w / 2, y = h / 2;

    initwindow(w, h, "七巧板", 100, 100);

    while (true) {
        draw_board(x, y, w, h);
        if (wait_event(50) == MOUSE_EVENT) {
            int mx = get_mouse_x();
            int my = get_mouse_y();
            x = mx < w ? mx : w;
            y = my < h ? my : h;
        }
    }

    closegraph();

    return 0;
}

这个程序可以在窗口中绘制一个七巧板，并且可以通过鼠标交互来移动七巧板的位置。