/* 
* Code example for CP264 Data Structures II
* String, pointers, and array of strings
* HBF 
*/
#include <stdio.h>

struct arraywrapper {
  int arr[10];
};

void test(struct arraywrapper x) {
  int i;
  for (i=0; i<10; i++) {
    x.arr[i] = i;
  }
  
  for (i=0; i<10; i++) {
    printf("%d ", x.arr[i]);
  }
  printf("\nsize %d", sizeof(x));
}

void test1(struct arraywrapper *x) {
  int i;
  for (i=0; i<10; i++) {
    x->arr[i] = i;
  }
  
  for (i=0; i<10; i++) {
    printf("%d ", x->arr[i]);
  }
}

void test2(struct arraywrapper x[], int n) {
  int i, j;
  for (j=0; j<n; j++){ 
    for (i=0; i<10; i++) {
      x[j].arr[i] = i;
    }
  }
}

void main() {
  struct arraywrapper a = {0}; //initialize to 0
  printf("data in array wrapper\n");
  int i;
  for (i=0; i<10; i++) {
    a.arr[i] = 0;
  }
  test(a);
  printf("\ndata in array wrapper after function call\n");
  for (i=0; i<10; i++) {
    printf("%d ", a.arr[i]);
  }
  printf("\n");
  
  test1(&a);
  printf("\ndata in array wrapper after function call of reference pass\n");
  for (i=0; i<10; i++) {
    printf("%d ", a.arr[i]);
  }
  
  int m = 2;
  struct arraywrapper y[m];
  int j;
  for (j=0; j<m; j++){ 
    for (i=0; i<10; i++) {
      y[j].arr[i] = 0;
    }
  }
  printf("\ndata in array of wrapper structure");
  for (j=0; j<m; j++){ 
  printf("\n");
  for (i=0; i<10; i++) {
    printf("%d ", y[j].arr[i]);
  }
  }
  test2(y, m);
  printf("\ndata in array of wrapper structure after passing to function");
  for (j=0; j<m; j++){ 
    printf("\n");
  for (i=0; i<10; i++) {
    printf("%d ", y[j].arr[i]);
    }
  }
}

/*
data in array wrapper
0 1 2 3 4 5 6 7 8 9
size 40
data in array wrapper after function call
0 0 0 0 0 0 0 0 0 0
0 1 2 3 4 5 6 7 8 9
data in array wrapper after function call of reference pass
0 1 2 3 4 5 6 7 8 9
data in array of wrapper structure
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
data in array of wrapper structure after passing to function
0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
*/