text: #include <stdio.h>
  
     /* %d prints signed decimal */
     /* %u prints unsigned decimal */
     /* %x prints hexidecimal */
  
  int main() {
  
     int x = -1;
     unsigned u = 2147483648; /* 2 to the 31st */
  
     printf("x = %u = %d\n", x, x);
     printf("u = %u = %d\n", u, u);
  }