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Turbo C 2.0、Borland C++库函数及用例(45) 函数名: getlinesettings
功 能: 取当前线型、模式和宽度
用 法: void far getlinesettings
( struct linesettingstype far *lininfo );
程序例:#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>/* the names of the line styles supported */
char *lname[] = { "SOLID_LINE",
"DOTTED_LINE", "CENTER_LINE",
"DASHED_LINE",
"USERBIT_LINE"
};int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
struct linesettingstype lineinfo;
int midx, midy;
char lstyle[80], lpattern[80], lwidth[80];
/* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
printf("Graphics error: %s\n",
grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1); /* terminate with an error code */
} midx = getmaxx() / 2;
midy = getmaxy() / 2; /* get information about current line settings */
getlinesettings(&lineinfo); /* convert line information into strings */
sprintf(lstyle, "%s is the line style.",
lname[lineinfo.linestyle]);
sprintf(lpattern,"0x%Xis the user-defined line pattern.",
lineinfo.upattern);
sprintf(lwidth, "%d is the line thickness.",
lineinfo.thickness);
/* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, lstyle);
outtextxy(midx, midy+2*textheight("W"), lpattern);
outtextxy(midx, midy+4*textheight("W"), lwidth); /* clean up */
getch();
closegraph();
return 0;
}
函数名: getmaxcolor
功 能: 返回可以传给函数setcolor的最大颜色值
用 法: int far getmaxcolor(void);
程序例:#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode; int midx, midy;
char colstr[80]; /* initialize graphics and local variables
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