how to create 64 bit int, unsigned long long variable with c++

#include <stdio.h>
#include <inttypes.h>


int main(){


  uint64_t x = -10033333000;
  int64_t y =  113333334445533;

  // print x as unsigned variable PRIu64
  printf("value of x is: %" PRIu64 ,x);
  printf("\n");
  // print x as integer variable PRIi64
  printf("value of y is: %" PRIi64,y);
  printf("\n");


  // this is the same like y
  unsigned long long z = -212121212121;
  printf("value of z is: %llu",z,"\n");
  printf("\n");


  return 0;
}

gcc  int64bit.c -o int64bit
int64bit.c: In function ‘main’:
int64bit.c:8: warning: integer constant is too large for ‘long’ type
int64bit.c:9: warning: integer constant is too large for ‘long’ type
int64bit.c:18: warning: integer constant is too large for ‘long’ type
rex@ubuntu:~/cpp$ ./int64bit
value of x is: 18446744063676218616
value of y is: 113333334445533
value of z is: 18446743861588339495