// C program to store a week of temperature data for two different cities
// Note: I had to add the fflush to ensure that the output from the program was being printed when it was meant to since my terminal is weird with the buffer and I don't know why. lol

#include <stdio.h>
const int CITY = 2;
const int WEEK = 7;

int main(){
  int temperature[CITY][WEEK];

  // Using a nested loop to store the values in a 2D array
  // Note: There is no difference between ++i and i++ in a for loop.
  //       ++i is more efficient for some C compilers.
  //       ++i vs i++ matters when more than one operation is taking
  //       place on the same line of code e.g. b = ++x; vs b = x++;
  for (int i = 0; i < CITY; ++i){
    fflush(stdout);
    for (int j = 0; j < WEEK; ++j){
      printf("City %d, Day %d: ", i + 1, j + 1);
      fflush(stdout);
      scanf("%d", &temperature[i][j]);
    }
  }
  printf("\nDisplaying values: \n\n");

  // Using a nested loop to display the values of a 2D array
  for (int i = 0; i < CITY; ++i){
    for (int j = 0; j < WEEK; ++j){
      printf("City %d, Day %d = %d\n", i + 1, j + 1, temperature[i][j]);
      fflush(stdout);
    }
  }
  return 0;
}

// C program to find the sum of two matrices of order 2*2

#include <stdio.h>
int main(){
  float a[2][2], b[2][2], result[2][2];

  // Taking input using a nested for loop
  printf("Enter elements of 1st matrix\n");
  fflush(stdout);

  // Note: for loops that have no curly braces only considers the
  //       first statement immediately below the initialization as
  //       being a part of the for loop block. This is similar with
  //       if statements as we will see later on in this code.
  for (int i = 0; i < 2; ++i)
    for (int j = 0; j < 2; ++j){
      printf("Enter a%d%d: ", i + 1, j + 1);
      fflush(stdout);
      scanf("%f", &a[i][j]);
    }


  // Taking input using nested for loop
  printf("Enter elements of 2nd matrix\n");
  fflush(stdout);
  for (int i = 0; i < 2; ++i)
    for (int j = 0; j < 2; ++j){
      printf("Enter b%d%d: ", i + 1, j + 1);
      fflush(stdout);
      scanf("%f", &b[i][j]);
    }


  // adding corresponding elements of two arrays
  for (int i = 0; i < 2; ++i)
    for (int j = 0; j < 2; ++j)
      result[i][j] = a[i][j] + b[i][j];

  // Displaying the sum
  printf("\nSum Of Matrix:");
  fflush(stdout);

  for (int i = 0; i < 2; ++i)
    for (int j = 0; j < 2; ++j)
    {
      printf("%.1f\t", result[i][j]);
      fflush(stdout);

      // Note: Only the first statement directly under the "if"
      //       statement is consider a part of the "if" block.
      //       THis is because there are not curly braces used
      //       with the "if" statement. This is similar to the
      //       for loops scenario mentioned above.
      if (j == 1){
        printf("\n");
        fflush(stdout);
      }
    }

  return 0;
}