/**
 * CSCE 236 Embedded Systems 
 * Spring 2016
 * Homework 1, programming component
 *
 * Look for comments that include "Student Code" to indicate where you
 * should fill in code.
 **/




#include <stdio.h>
#include <string.h>



/**
 * Return your user name
 **/
char* getFullName(void){
  ////////////////////////// Student Code //////////////////////////
  //  Write code to return a pointer to a _global_ variable that
  //  contains your full name.
  
  return "tbd";
}

////////////////////////// Student Code //////////////////////////
// Write a funciton called getLastName() that returns a pointer to the
// same _global_ variable that contains your full name, but that
// starts at your last name.
//


/**
 * Gets the ith character of the user name or returns '!' if the name
 * is not that long.
 **/
char getFullNameChar(int i){
  char *name = getFullName();
  
  ////////////////////////// Student Code //////////////////////////
  //  Write code to return the ith character of name or '!' if an out
  //  of bounds index is requested.  Do _not_ use strlen or equivalent
  //  functions to determine the length of the string, instead, write
  //  your own code to determine the length of the string (look for
  //  the null termination of the name string: '\0').

  
  return name[0];
}

/**
 * Print the results of the string operation tests
 **/
void stringOperations(void){
  char *name = getFullName();

  printf("Name: %s\n",name);
  ////////////////////////// Student Code //////////////////////////
  // Uncomment the following code once you create the getLastName() function
   /*
  printf("LastName: %s\n",getLastName());
   */
  printf("Name[0]: %c\n",getFullNameChar(0));
  printf("Name[4]: %c\n",getFullNameChar(4));
  printf("Name[%d] (last): %c\n",(int)strlen(name)-1,
         getFullNameChar(strlen(name)-1));
  printf("Name[%d] (oob): %c\n",(int)strlen(name),
         getFullNameChar(strlen(name)));
  printf("Name[%d] (oob): %c\n",(int)strlen(name)+10,
         getFullNameChar(strlen(name)+10));

  printf("\n");
}

/**
 * Print the output of various bit operations
 **/
void bitOperations(void){
  int varA = 0x81914;
  int varB = 0x10236;

  ////////////////////////// Student Code //////////////////////////
  // Complete the following print statements by ouputing the value
  // after doing the bit operations indicated in the comments.  You
  // should not periminately modifiy the value of the variables.

  // Output the value (1 or 0) of bit 4 (zero referenced) in varA and varB
  printf("Bit 4 in varA: %#x\n",
           varA);
  printf("Bit 4 in varB: %#x\n",
           varB);

  // Output the value of varA after setting bit 5 (zero referenced) to 0
  printf("Bit 5 set to 0 varA: %#x\n",
           varA);

  // Output the value of varB after setting bit 7 (zero referenced) to 1
  printf("Bit 7 set to 1 varB: %#x\n",
           varB);
  
  // Output the value of the varA after setting the 3-5 bits
  // (inclusive) of varA to the lower 3 bits of varB.
  printf("varA after...: %#x\n",
           varA);
  
}

/**
 * Main function that calls the corresponding functions
 **/
int main(){
  printf("CSCE 236 HW1 Output\n");
  printf("-------------------\n");
  stringOperations();
  bitOperations();

  return(0);
}