program_7_2.cpp

来自「清华关于C++ 的程序讲义 值得一看 关于算法」· C++ 代码 · 共 22 行

// program 7.2: Display color palette
#include <rect.h>
SimpleWindow ColorWindow("Color Palette", 8.0, 8.0);
int ApiMain() {
    const float SideSize = 1.0;
    float XPosition = 1.5;
    const float YPosition = 4;
    ColorWindow.Open();
    // Create a RectangleShape to use
    RectangleShape ColorPatch(ColorWindow,
        XPosition, YPosition, White, SideSize, SideSize);
    // Loop over colors drawing ColorSquare with
    // that color next to the previous square
    for (color c=Red; c<=Magenta; c=(color(c+1))) {
        ColorPatch.SetColor(c);
        ColorPatch.SetPosition(XPosition, YPosition);
        ColorPatch.Draw();
        XPosition += SideSize;
    }
    return 0;
}