头文件显示图形。h包含 setcolor() 用于将当前图形颜色设置为新颜色的函数。 语法:
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void setcolor(int color);
说明: 在图形中,每种颜色都指定了一个数字。可用的颜色总数为16种。可用颜色的数量取决于当前的图形模式和驱动程序。例如,setcolor(红色)或setcolor(4)将当前图形颜色更改为红色。请记住,默认的图形颜色是白色。颜色表如下所示。
COLOR INT VALUES ------------------------------- BLACK 0 BLUE 1 GREEN 2 CYAN 3 RED 4 MAGENTA 5 BROWN 6 LIGHTGRAY 7 DARKGRAY 8 LIGHTBLUE 9 LIGHTGREEN 10 LIGHTCYAN 11 LIGHTRED 12 LIGHTMAGENTA 13 YELLOW 14 WHITE 15
下面是setcolor()函数的实现。
// C Implementation for setcolor() #include <graphics.h> #include <stdio.h> // 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, color; // initgraph initializes the // graphics system by loading a // graphics driver from disk initgraph(&gd, &gm, "" ); // Draws circle in white color // center at (100, 100) and radius // as 50 circle(100, 100, 50); // setcolor function setcolor(GREEN); // Draws circle in green color // center at (200, 200) and radius // as 50 circle(200, 200, 50); getch(); // closegraph function closes the // graphics mode and deallocates // all memory allocated by // graphics system . closegraph(); return 0; } |
输出:
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