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874天前#include <conio.h> |
#include <dos.h> |
/* function prototype */ |
void writechar(char ch); |
int main(void) |
{ |
clrscr(); |
gotoxy(80,25); |
writechar('*'); |
getch(); |
return 0; |
} |
/* |
outputs a character at the current cursor |
position using the video BIOS to avoid the |
scrolling of the screen when writing to |
location (80,25). |
*/ |
void writechar(char ch) |
{ |
struct text_info ti; |
/* grab current text settings */ |
gettextinfo(&ti); |
/* interrupt 0x10 sub-function 9 */ |
_AH = 9; |
/* character to be output */ |
_AL = ch; |
_BH = 0; /* video page */ |
_BL = ti.attribute; /* video attribute */ |
_CX = 1; /* repetition factor */ |
geninterrupt(0x10); /* output the char */ |
} |
