example struct code

structs.c

#include <stdio.h>
#include <stdlib.h>

struct student {
  char name[100];
  int age;
};

struct student make_student() {
  struct student cur_student;
  printf("1 What's your name?\n");
  scanf("%s", cur_student.name);
  printf("What's your age?\n");
  scanf("%d", &cur_student.age);

  // printf("Hello, %s! you're %d years old!\n",
  //    cur_student.name, cur_student.age);
  return cur_student;
}

#define NUM_STUDENTS 3
#define FAIL -1

struct student find_by_age(int age,
    struct student students[NUM_STUDENTS]) {
  int i = 0;
  while (i < NUM_STUDENTS) {
    if (students[i].age == age) {
      return students[i];
    }
    i+=1;
  }
  exit(1);
}

void print_student(struct student cur) {
    printf("Hello, %s! you're %d years old!\n",
       cur.name, cur.age);
}
int main() {
  // char name[100];
  // int age;
  struct student all_students[NUM_STUDENTS];
  for (int i=0; i<NUM_STUDENTS; i++) {
    all_students[i] = make_student();
  }
  for (int i=0; i<NUM_STUDENTS; i++) {
    print_student(all_students[i]);
  }

  int age_to_find;
  printf("What age do you want to search for? ");
  scanf("%d", &age_to_find);
  struct student blah = find_by_age(age_to_find, all_students);
  print_student(blah);


  return 0;
}