Updating text on the current line..

[AlbafaN]

OK.. this is a console app...

-------------
#include <stdio.h>
#include <iostream.h>

void main(void)
{
int i=0;

printf( "%i", i );

for( i=0; i<10; i++ )
{
// update %i with value of i
}
}
-------------

now i want to have it count to 10... but just update the current line where the printf is printing i (like it will show 1, then replace 1 with 2, then replace 2 with 3, etc etc...) .... but i dont know how to update the current line..... anyone know how?

[abdul]

#include <stdio.h> 
#include <iostream.h> 

void main(void) 
{ 
    int i=0; 
    
    
    for( i=0; i<10; i++ ) 
    { 
        // update %i with value of i 
        printf( "%i", i ); 
    }
    cin>>i;
} 

It will only count from 0 to 9 but you can make it count up to 10 by changing the for loop header to:

for( i=0; i<=10; i++ ) 

[AlbafaN]

that just prints out 0123456789 and then inputs a #..

i need it to keep updating the number on the screen...

so when the program is counting, all you will see is the current number.

... you know how when some programs run, and show their percent done....

like say this is the line printed to the console.....

"Copying files, 10% complete"


... how do they keep updating the percent on the current line?

[abdul]

#include <stdio.h> 
#include <iostream.h> 
void main(void) 
{ 
    int i=0; 
    
    
    for( i=0; i<=10; i++ ) 
    { 
        // update %i with value of i 
        printf( "%i", i ); 
        printf("\\b");
        
    }
    cin>>i;
} 

You may also need some kind of delay to keep the number stayed on the screen for some time.

[CornedBee]

And you need to determine the number of digits i has because you must output \b that many times...

Or output this string:
"\r \r"
Put as many spaces between the two \r as you have digits at maximum (currently there are 5)

[AlbafaN]

thx .. ya i was just told about \r from my friend..

but then i went into wondering further how you would update text on a different line.... so i finally found the console functions in the msdn.. so i wrote up a little sample program .... ill paste it below in case anyone was wondering how to do it..

#include <windows.h>

void main(void)
{
	HANDLE hScreenBuf;
    COORD coordBufSize; 
    COORD coordBufCoord;
	DWORD dwRead;
	char buffer[100];
	char chBuffer[100] = "This is my text";
	
	// create a new screen buffer for reading and writing
	hScreenBuf = CreateConsoleScreenBuffer(
		GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
	
	// set the screen buffer size (50 columns x 10 rows)
	coordBufSize.X = 50;
	coordBufSize.Y = 10;
	SetConsoleScreenBufferSize(hScreenBuf, coordBufSize);

	// set new screen buffer as the active screen buffer
	SetConsoleActiveScreenBuffer(hScreenBuf);
	
	// set the cursor at position (10,3) on the screen buffer
	coordBufCoord.X = 10;
	coordBufCoord.Y = 3;
	SetConsoleCursorPosition(hScreenBuf, coordBufCoord);

	// print chBuffer to the screen buffer (at the position we set earlier)
	WriteConsole(hScreenBuf, chBuffer, strlen(chBuffer), 0, NULL);

	// reset pointer at position (10,3) so we can read what we just printed
	coordBufCoord.X = 10;
	coordBufCoord.Y = 3;

	// read from screen buffer and put into buffer variable
	ReadConsoleOutputCharacter(
		hScreenBuf, &buffer[0], strlen(chBuffer), coordBufCoord, &dwRead);
	
	// null terminate the string
	buffer[dwRead] = '\0';

	// show what was read from screen buffer in a message box
	MessageBox(NULL, buffer, "", NULL);
	
	// set stdout (standard output) back to the active screen buffer
	SetConsoleActiveScreenBuffer(GetStdHandle(STD_OUTPUT_HANDLE));
	// close the screen buffer object we created
	CloseHandle(hScreenBuf);
}