Writing a program to print out the binary value of a 16 bit number

[velabrito]

Hi I am having trouble with my homework, i just started c language and this is my fourth week.

Homework Assignment: Week 4
Write a program to print out the binary value of a 16 bit number.
Create integers i, count, and mask.
Set 'i' to a hex value of 0x1b53.
Set mask to a value of 0x8000. Why?
print a line to show the hex value of i and then the leader for the binary value like this:
Hex value = 1b53 Binary=
Use a for loop to loop 16 times and print 16 digits, using count as the loop counter
To test for each digit value, bitwise and 'i' with 'mask'
when the result for the bitwise and is true, print the number '1'
when the result for the bitwise and is false, print the number '0'
then shift mask one place to the right
print a new line and then quit
Use prtscrn and make a hard copy of the code with the console output.
Extra: use the modulus of count and print a space after every 4th
digit to make the binary easier to read
The output should look like this:
Hex value = 1b53, Binary= 0001 1011 0101 0011


so far this is what i have

#include <stdio.h>
#include <stdlib.h>
 
int main()
{
    int i, count, mask;
    //   1B53  0001 1011 0101 0011
    //   8000  1000 0000 0000 0000
    i = 0x1b53;
    mask = 0x8000;
 
    printf("i = %X, mask = %x\n", i, mask);
    printf("i binary = 0001 1011 0101 0011\n mask binary = 1000 0000 0000 0000");
 
    for(i=0; i<=15; i++);
    {
        if(i & mask);
        {//true
        printf("1");
        }
            else;
        {//false
        printf("0");
        }
 
    mask = mask >> 1;
    }
 
 
    return 0;
}

it is telling me that there is an "else" without previous "if", also is the program that I wrote correct?
Thanks

[weaknessforcats]

It's here:

if(i & mask); <---!!!
 {//true
 printf("1");

[velabrito]

Thanks, now it works. Is the program I wrote correct? when i run it just gives me a the i value, the mask value and a 0. I don't know if the loop is correct.

[weaknessforcats]

Just calculate the binary by and for i. So if i is 5 the binary is 101.

You are using an int which allows negative values so be aware that negative values are probably stored in 2's complement. Personally, I would use an unsigned ints.