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

/* Structure Definition */
typedef struct{
    int flight_number;
    char destination[50];
    int available_seats;
}Flight;

/* Function Prototypes */
void input_flights(int n, Flight flights[n]);
int search_flights(int n, Flight flights[n], char destination[], int result[]);
void display(int count, int result[], Flight flights[]);

int main()
{
   int n = 4;
   Flight flights[n];
   input_flights(n,flights);
   char search_dest[50];
   int result[n];
   
   printf("\nEnter destination to search: ");
   scanf("%s",search_dest);
  int count=search_flights(n,flights,search_dest,result);
  display(count,result,flights);
    return 0;
}

/* Function to input flight details */
void input_flights(int n, Flight flights[n])
{
    for(int i=0;i<n;i++){
        printf("\nEnter details of flight %d\n",i+1 );

        printf("Enter flight number: ");
        scanf("%d",&flights[i].flight_number);
        // write code

        printf("Enter destination: ");
        scanf("%s",flights[i].destination);
        // write code

        printf("Enter available seats: ");
        scanf("%d",&flights[i].available_seats);
        // write code
    }
}

/* Function to search flights */
int search_flights(int n, Flight flights[n], char destination[], int result[])
{
    int count = 0;
    for(int i=0;i<n;i++){
        if(strcmp(destination,flights[i].destination)==0){
            result[count] = i;
            count++;
        }
    }
        // write condition using strcmp
        // store index in result[count]
    return count;
}

/* Function to display result */
void display(int count, int result[], Flight flights[])
{
   if(count==0){
        printf("No flight available to the given destination\n");
   }
  else{
        printf("Flights available:\n");
       for(int i=0;i<count;i++){ 
           int idx = result[i];
        printf("Flight Number: %d\n", flights[idx].flight_number);
      }
   }
}


&&&&&&&&&&&


#include <stdio.h>

/* Structure Definition */
typedef struct {
    int length;
    int width;
    int area;
} Rectangle;

/* Function Prototypes */
void input_rectangles(int n, Rectangle rects[n]);
void calculate_areas(int n, Rectangle rects[n]);
int find_max_index(int n, Rectangle rects[n]);
void display_areas(int n, Rectangle rects[n]);
void display_max(Rectangle rects[], int max_index);

int main()
{
    int n;
    printf("Enter number of rectangles: ");
    scanf("%d", &n);

    if (n <= 0)
    {
        printf("Invalid number of rectangles\n");
        return 0;
    }

    Rectangle rects[n];
    input_rectangles(n, rects);
    calculate_areas(n, rects);
    display_areas(n, rects);
    int max_index = find_max_index(n, rects);
    display_max(rects, max_index);

    return 0;
}

/* Function to input rectangle details */
void input_rectangles(int n, Rectangle rects[n])
{
    for (int i = 0; i < n; i++) {
        printf("Enter length of rectangle %d: ", i + 1);
        scanf("%d", &rects[i].length);

        printf("Enter width of rectangle %d: ", i + 1);
        scanf("%d", &rects[i].width);
    }
}

/* Function to calculate areas */
void calculate_areas(int n, Rectangle rects[n])
{
    for (int i = 0; i < n; i++) {
        rects[i].area = rects[i].length * rects[i].width;
    }
}

/* Function to display all areas */
void display_areas(int n, Rectangle rects[n])
{
    printf("\nAreas of rectangles:\n");
    for (int i = 0; i < n; i++) {
        printf("Rectangle %d area = %d\n", i + 1, rects[i].area);
    }
}

/* Function to find index of rectangle with maximum area */
int find_max_index(int n, Rectangle rects[n])
{
    int max_index = 0;
    for (int i = 1; i < n; i++) {
        if (rects[i].area > rects[max_index].area) {
            max_index = i;
        }
    }
    return max_index;
}

/* Function to display rectangle with maximum area */
void display_max(Rectangle rects[], int max_index)
{
    printf("\nRectangle %d has the largest area = %d\n",
           max_index + 1, rects[max_index].area);
}