weird gcc behavior with unsigned ints

#include<iostream>
#include<fstream>
#include<cstdint>

using namespace std;

int main()
{
    uint16_t ii; 
    cin >> ii;                                                                                                                                                            
    printf("%d\n",(uint8_t)ii);
}

when i give input as 5 the output is also 5. But when i change "ii" declaration to be of type uint8_t, i do not get 5 but 53 which seemed to be ascii value of 5. Is this expected?