Program to show various way to pass arguments to function in C

#include
 
/* Program to show various way to pass arguments to function in C */
 
/* demonstrate pass by pointer */
void swap(int *x, int *y);

/* demonstrate pass by value */
void swap(int x, int y); 

/* demonstrate pass an array to the function */
void bubble_sort(int a[], int size);
 
void print_array(int a[],int size);
 
void main()
{
    int x = 10;
    int y = 20;
 
    
    printf("x,y before swapping\n");
    printf("x = %d\n",x);
    printf("y = %d\n",y);
    
    // pass by value
    swap(x,y);
 
    printf("x,y after swapping using pass by value\n");
    printf("x = %d\n",x);
    printf("y = %d\n",y);
 
    // pass by pointer
    swap(&x,&y);
 
    printf("x,y after swapping using pass by pointer\n");
    printf("x = %d\n",x);
    printf("y = %d\n",y);
 
    // declare an array
    const int size = 5;
    int a[size] = {1,3,2,5,4};
 
    printf("array before sorting\n");
    print_array(a,size);
    
    bubble_sort(a,size);
 
    printf("array after sorting\n");
    print_array(a,size);
 
 
}
 
 
/* functions implementation */
 
void swap(int *x, int *y){
    int temp = *x;
        *x = *y;
        *y = temp;
}
 
void swap(int x, int y){
    int temp = x;
        x = y;
        y = temp;
}
 
void bubble_sort(int a[], int size)
{
   int i,j;
   for(i=0;i<(size-1);i++)
      for(j=0;j<(size-(i+1));j++)
             if(a[j] > a[j+1])
                    swap(&a[j],&a[j+1]);
}
 
void print_array(int a[],int size)
{
 
    for(int i = 0;i < size; i++)
    {
        printf("%d\t",a[i]);
        printf("\n");
    }
}