Turbo C 2.0、Borland C++库函数及用例

Turbo C 2.0、Borland C++库函数及用例(47) {
/* request auto detection */
int gdriver = DETECT, gmode, errorcode; int midx, midy;
char xrange[80], yrange[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; /* convert max resolution values into strings */
sprintf(xrange, "X values range from 0..%d", getmaxx());
sprintf(yrange, "Y values range from 0..%d", getmaxy()); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(midx, midy, xrange);
outtextxy(midx, midy+textheight("W"), yrange); /* clean up */
getch();
closegraph();
return 0;
}
函数名: getmodename
功 能: 返回含有指定图形模式名的字符串指针
用 法: char *far getmodename(int mode_name);
程序例:#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>int main(void)
{
/* request autodetection */
int gdriver = DETECT, gmode, errorcode; int midx, midy, mode;
char numname[80], modename[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 mode number and name strings */
mode = getgraphmode();
sprintf(numname, "%d is the current mode number.", mode);
sprintf(modename, "%s is the current graphics mode.",
getmodename(mode)); /* display the information */
settextjustify(CENTER_TEXT, CENTER_TEXT); outtextxy(midx, midy, numname);