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Turbo C 2.0、Borland C++库函数及用例(50) {
x = random(maxx);
y = random(maxy);
color = random(maxcolor);
putpixel(x, y, color);
} delay(DELAY_TIME);
srand(seed);
for (i=0; i<PIXEL_COUNT; i++)
{
x = random(maxx);
y = random(maxy);
color = random(maxcolor);
if (color == getpixel(x, y))
putpixel(x, y, 0);
}
}
/* clean up */
getch();
closegraph();
return 0;
}
函数名: gets
功 能: 从流中取一字符串
用 法: char *gets(char *string);
程序例:#include <stdio.h>int main(void)
{
char string[80]; printf("Input a string:");
gets(string); printf("The string input was: %s\n",
string);
return 0;
}
函数名: gettext
功 能: 将文本方式屏幕上的文本拷贝到存储区
用 法: int gettext( int left, int top, int right,
int bottom, void *destin );
程序例:#include <conio.h>char buffer[4096];int main(void)
{ int i;
clrscr();
for (i = 0; i <= 20; i++)
cprintf("Line #%d\r\n", i);
gettext(1, 1, 80, 25, buffer);
gotoxy(1, 25);
cprintf("Press any key to clear screen...");
getch();
clrscr();
gotoxy(1, 25);
cprintf("Press any key to restore screen...");
getch();
puttext(1, 1, 80, 25, buffer);
gotoxy(1, 25); cprintf("Press any key to quit...");
getch();
return 0;
}
函数名: gettextinfo
功 能: 取得文本模式的显示信息
用 法: void gettextinfo(struct text_info *inforec);
程序例:#include <conio.h>int main(void)
{
struct text_info ti;
gettextinfo(&ti);
cprintf("window left %2d\r\n",ti.winleft);
cprintf("window top %2d\r\n",ti.wintop);
cprintf("window right %2d\r\n",ti.winright); cprintf("window bottom %2d\r\n",ti.winbottom);
cprintf("attribute %2d\r\n",ti.attribute);
cprintf("normal attribute %2d\r\n",ti.normattr);
cprintf("current mode %2d\r\n",ti.currmode);
cprintf("screen height %2d\r\n",ti.screenheight);
cprintf("screen width %2d\r\n",ti.screenwidth);
cprintf("current x %2d\r\n",ti.curx);
cprintf("current y %2d\r\n",ti.cury);
return 0;
}
函数名: gettextsettings
功 能: 返回有关当前图形文本字体的信息
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