C Arrays and Pointers

Question 1;

#include<stdio.h>

void abc(char a[]){
 a++;
 printf("%c\n",*a);
 a++;
  printf("%c\n",*a);
}
int main(){
 char a[100];
 a[0]='a';a[1]='b';a[2]='c';a[4]='d';
 abc(a);
 printf("%c",*a);
 getchar();
}
Output:bca
Explanation:

The base address is modified only in function and as a result a points
to 'b' then after incrementing to 'c' so bc will be printed.