# Print an int in binary representation using C

From: http://stackoverflow.com/questions/1024389/print-an-int-in-binary-representation-using-c
Note:: Only for personal archive

// buffer must have length >= sizeof(int) + 1
// Write to the buffer backwards so that the binary representation
// is in the correct order i.e.  the LSB is on the far right
// instead of the far left of the printed string
char *int2bin(int a, char *buffer, int buf_size) {
    buffer += (buf_size - 1);

    for (int i = 31; i >= 0; i--) {
        *buffer-- = (a & 1) + '0';

        a >>= 1;
    }

    return buffer;
}

#define BUF_SIZE 33

int main() {
    char buffer[BUF_SIZE];
    buffer[BUF_SIZE - 1] = '\0';

    int2bin(0xFF000000, buffer, BUF_SIZE - 1);

    printf("a = %s", buffer);
}