Hi, i'm really new to programming in C, and iam kind of stuck on this problem, the question is
Write a C function to print out an integer value in base 4 (using only the digits 0, 1, 2, 3). Use this function to write
a program that reads an integer from the keyboard and displays it in base 4 on the screen.

Now i dont understand wat it means by using digits(0, 1, 2, 3), does it mean 00, 01, 02, 03, 10, n so on???

And with regards to the base 4 thing, i knw how to solve it mathematically, heres an example

Using Division
Let's take a number in base 10, like 231 and change it to base 4. First divide 231 by 4

231/4 = 57 with a remainder of 3

Now divide 57 by 4

57/4 = 14 with a remainder of 1

Divide 14 by 4

14/4 = 3 with a remainder of 2

Divide 3 by 4

3/4 = 0 with a remainder of 3

Am i on the rite track with that?

and now finally with regards to the coding side of it, all i really came up with is this...

``````#include <stdio.h>

int main(){
int number;

printf("Enter a number: ");
scanf("%d", &number);

system("Pause");
return 0;
}``````

Can some1 plz help me.....

But it's your homework, not mine.
Or search daniweb C (and C++) forums: there are lots of thread on this extreme popular topic...

alrite..

i worked on the mathematical part and converted it to code

``````char *conv_base(long number, int base){
long calculateRemainder;
int  n = 0, k = 0;
static char temp, result;
static char *digit = "0123456789ABCDEF"; // list of digits"0123456789ABCDEF"

do{
// modulus to get the  remainder, practically the same process above, but written in code
calculateRemainder = number % base;
number = number / base;
temp[k++] = digit[calculateRemainder];
}  while (number > 0);

while(k >= 0){
// spell forward
result[n++] = temp[--k];
}

result[n-1] = 0;
return (result);
}``````

is this a rite approach, iam lookin for an answer just in base 4( digits 0, 1, 2, 3)..??

It looks good - does it work?

yes it does work now, one more problem, I havent been thought how to redirect from a text file into a program, my last question asks me to Note: User can use
redirection to enter a number from a text file to the program.
, i honestly havent been thought this yet, so i was wondering if someone could help me out...

But your program can't detect stdin redirection so everybody can invoke it right now:

``yourprogname <theonlynumberbase4.txt``

What's a problem?