Week 4 Code Examples

#include <stdio.h>

#define SIZE 3

// good activity is to add a string here (student's name)
struct student_record {
  int age;
  double WAM;
  int abscences;
};

void print_student(struct student_record student_to_print) {
  printf("Printing student\n");
  printf("Student is %d years old\n", student_to_print.age);
  printf("Student has a %lf WAM\n", student_to_print.WAM);
  printf("Student was absent %d times\n", student_to_print.abscences);
  printf("\n\n");
}

int main(void) {
  // create a single student_record named student_1
  // struct student_record student_1;

  // array of structs
  // array it's <type> <name>[SIZE]
  struct student_record students[SIZE] = {};

  int i = 0;
  while (i < SIZE) {
    students[i].age = 25;
    students[i].WAM = 80;
    students[i].abscences = 0;
    i++;
  }

  i = 0;
  while (i < SIZE) {
    // we pass each individual struct value to the print function
    print_student(students[i]);
    i++;
  }

  return 0;
}

#include <stdio.h>
#include <string.h>
// 49 real elements + 1 Null terminating character
#define MAX_LEN 50

int main(void) {

    char first_name[MAX_LEN] = "Jake";
    char last_name[MAX_LEN] = "Renzella";

    char full_name[MAX_LEN] = "";

    strcat(full_name, first_name);
    strcat(full_name, " ");
    strcat(full_name, last_name);

    fputs(full_name, stdout);
    

    return 0;
}

#include <stdio.h>
#include <string.h>
// 49 real elements + 1 Null terminating character
#define MAX_LEN 50

int main(void) {

    char first_name[MAX_LEN] = "Jake";
    char last_name[MAX_LEN] = "Renzella";

    printf("%d\n", strcmp(first_name, "Kale"));

    return 0;
}

#include <stdio.h>
#include <string.h>
// 49 real elements + 1 Null terminating character
#define MAX_LEN 50

int main(void) {

    char name[MAX_LEN] = "Jake";

    strcpy(name, "Bri");

    fputs(name, stdout);
    printf("\n");

    printf("Enter your name: ");
    fgets(name, MAX_LEN, stdin);

    fputs(name, stdout);

    return 0;
}

#include <stdio.h>

// I know my string will never need to be more than 15 chars
#define MAX_LENGTH 15

int main(void) {
    char name[MAX_LENGTH];

    printf("Welcome to Jakes computer\n");
    printf("If your name is Jake you will get a welcome message\n");
    printf("Else you'll get told to leave\n\n\n");
    printf("Enter your name: ");

    // fgets reads the entire string, including the newline character
    while (fgets(name, MAX_LENGTH, stdin) != NULL) {
        fputs(name, stdout);

        // if name is something, do something
        // else do something

        printf("Enter your name: ");
    }

    return 0;
}

#include <stdio.h>
#include <string.h>
// 49 real elements + 1 Null terminating character
#define MAX_LEN 50

int main(void) {

    char first_name[MAX_LEN] = "Jake";

    //strlen returns count of characters before \0
    // this is 4
    printf("Length of first_name is: %d\n", strlen(first_name));


    printf("Enter your name: ");
    // it stores \n in the array
    fgets(first_name, MAX_LEN, stdin);

    // strlen is returning +1
    printf("Length of first_name is: %d\n", strlen(first_name));

    return 0;
}

#include <stdio.h>

int main(void) {

    int data[7] = {};

    int i = 0;
    while(i < 7) {
        printf("value at %d is: %d\n", i, data[i]);
        i++;
    }

    return 0;
}

#include <stdio.h>
#include <string.h>  // gets us fgets

#define ROWS 5
#define COLS 5

#define MAX_ROOM_NAME_LEN 50

struct room {
  char name[MAX_ROOM_NAME_LEN];
  int ocupants;

  // 4 ints = 0 == wall
  //          1 == door
  int west;
  int north;
  int south;
  int east;
};

struct room new_room(void) {
  struct room new_room;

  printf("Create a new room\n");

  printf("What's its name?\n");
  fgets(new_room.name, MAX_ROOM_NAME_LEN, stdin);

  printf("\n");
  printf("How many occupants?: ");
  scanf("%d", &new_room.ocupants);

  return new_room;
}

void print_building(struct room building_to_print[ROWS][COLS]) {
  printf("\nBuilding layout:\n");

  int row = 0;
  while (row < ROWS) {
    int col = 0;
    while (col < ROWS) {
      // print top wall!
      printf("%c", building_to_print[row][col].north);
      col++;
    }
    row++;
    printf("\n");
  }
}

int main(void) {
  // creating a 2d array of a struct room
  struct room building[ROWS][COLS] = {};

  // let the user build out 5 rooms
  // always start at bottom center
  // ask the user for details and where the room leads
  int current_row = ROWS - 1;  // this is the bottom row
  int current_col =
      COLS / 2;  // ints round to nearest floor, odd cols so this works...

  int i = 0;
  while (i < 1) {
    printf("Welcome to room builder\n");
    printf("Which direction would you like to go?\n");
    printf("n is NORTH, e is EAST, w is WEST, s is SOUTH\n");

    // scan the users choice into a char
    char direction;
    scanf(" %c ", &direction);

    int next_row = current_row;
    int next_col = current_col;

    if (direction == 'n') {
      // we need to know the NEXT ROOM, and the CURRENT ONE
      next_row--;

      // create a room at the new position
      // this is not validated (could be an impossible room?)
      building[next_row][next_col] = new_room();
      building[current_row][current_col].north = 1;
      building[next_row][next_col].south = 1;
    } else if (direction == 'e') {
    } else if (direction == 's') {
    } else if (direction == 'w') {
    }

    i++;
  }

  print_building(building);

  return 0;
}