Question

TASK:

to receive this checkpoint, you must write a simple function that displays a text message on the

screen. The function signature should be:

void print_to_screen(char *message);

This function should accept a string, and write each character of the string to the screen, and

increase the

current_screen_x

variable for each character printed.

You will need to maintain a pointer to the current line on the screen, as well as the position on

that line. You could do this with definitions like:

unsigned char *current_screen_line = $0400;

unsigned char current_screen_x = 0;

Implement the

print_to_screen()

function.

Now create a second function called print_newline() that advances

current_screen_line

to the next line, and resets

current_screen_x

to zero, so that printing can continue from the

next line.

Call your new

print_to_screen()

and

print_newline()

functions from your

reset()

function to print the two messages “YOURFAN operating system starting...” and

“testing hardware” on separate lines.

Test you program with the following commands:

cd ${HOME}/repo/unit3

make test3.1

please help me to solve this problem, thanks a lot!

Answer 1

The Code you expected is made for turbo c compilers.

#include <stdio.h>
#include<conio.h>

#include<windows.h>

int current_screen_x=0;
int current_screen_y=0;

void gotoxy(int x,int y)

{

COORD c;

c.X=x;

c.Y=y;

SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),c);

}

void print_to_screen(char *message)
{
int i;
for(i=0;message[i]!='\0';i++)
{
printf("%c",message[i]);
current_screen_x++;
}
}

void print_newline()
{
int y=wherey();
current_screen_x=0;
gotoxy(current_screen_x,y+1);

}
void reset()
{
char *str1="YOURFAN operating system starting....";
char *str2="testing hardware";
print_to_screen(str1);
print_newline();
print_to_screen(str2);
}

void main() {
clrscr();
   reset();

getch();

}