What is the function of 'switched' and 'size-=1' in this bubble sort program? Can I just delete it if it's not important?

Question

#include <stdio.h>
void bubblesort(int a[], int size);
int main(){
int arr[10]={1,2,3,4,5,6,7,8,9,10};
int i=0;
printf("before:\n");
for(i=0;i<10;i++)
printf("%d", arr[i]);
printf("\n");
bubblesort(arr, 10)
printf("after:\n");
for(i=0;i<10;i++)
printf("%d", arr[i]);
printf("\n");
return 0;
}
void bubblesort(int a[], int size){
int switched=1, hold=0, i=0, j=0;
size -=1;
for(i=0;i<size && switched; i++){
switched=0;
for(j=0; j<size-i; j++)
if(a[j]>a[j+1]){
switched=1;
hold=a[j];
a[j]=a[j+1];
a[j+1]=hold;}
}}

Answer 1

Bennett Post , I want to ask again:))
in the middle of for-looping is to show when the loop stops, what is the switched function for? why is it there?

for(i=0;i<size && switched; i++)

Answer 2

ooh, i see...
thankyou soooo much