Question

While looking at some conceptual questions in C,I came across this question in a book.
What is the output of the following program ?

#include<stdio.h>
#include<string.h>
int main()
{
    static char s[25]="The cocaine man";
    int i=0;
    char ch;
    ch=s[++i];
    printf("%c",ch);
    ch=s[i++];
    printf("%c",ch);
    ch=i++[s];
    printf("%c",ch);
    ch= ++i[s];
    printf("%c\n",ch);
    return 0;
}

Answer :

 hhe!

Can anyone please explain how this output came ?

Answer 1

Starting from the first assignment

ch=s[++i];

increments i(i=1) and assigns ch the character at index (i=1) of s.

ch=s[i++];

assigns ch the character at index (i=1) of s and then increments i(i=2).

ch=i++[s];

assigns ch the character at index (i=2) of s and then increments i(i=3). Key: s[i] == i[s].

ch= ++i[s];

increments the ASCII value at index (i=3) of s and assigns it to ch. Key : [] has higher precedence than prefix ++