//prints 192.168.0.101

#include <stdio.h>

void get_ip(char out[], unsigned int addr)
{
    unsigned char *a = (unsigned char *)&addr;
    sprintf(out, "%d.%d.%d.%d", a[3], a[2], a[1], a[0]);
}

int main()
{
    char addr[16];
    get_ip(addr, 3232235621U);
    puts(addr);
}