C语言中的getmaxcolor()函数

头文件graphics.h包含getmaxcolor()函数，该函数返回当前图形模式和驱动程序的最大颜色值。由于颜色编号从零开始，因此当前图形模式和驱动程序可用的颜色总数为(getmaxcolor()+ 1)。

句法 ：

int getmaxcolor();

以下是getmaxcolor()函数。

// C Implementation for getmaxcolor()
#include 
#include 
  
// driver code
int main()
{
    // gm is Graphics mode which is
    // a computer display mode that
    // generates image using pixels.
    // DETECT is a macro defined in
    // "graphics.h" header file
    int gd = DETECT, gm;
    char arr[100];
  
    // initgraph initializes the
    // graphics system by loading a
    // graphics driver from disk
    initgraph(&gd, &gm, "");
  
    // sprintf stands for “String print”.
    // Instead of printing on console, it
    // store output on char buffer which
    // are specified in sprintf
    sprintf(arr, "Maximum number of colors for "
                 "current graphics mode and "
               "driver = %d", getmaxcolor() + 1);
  
    // outtext function displays text
    // at current position.
    outtextxy(20, 100, arr);
  
    getch();
  
    // closegraph function closes the
    // graphics mode and deallocates
    // all memory allocated by
    // graphics system .
    closegraph();
  
    return 0;
}

输出 ：

想要从精选的最佳视频中学习和练习问题，请查看《基础知识到高级C的C基础课程》。