c语言获取字符串的第几个字符

#include<stdio.h>
int main()
{
    char* str = "HELLO";
    char c = str[0];
    printf("str[0]:%c\n", c);

    char d = "Hello"[1];
    printf("\"Hello\"[1]:%c\n", d);
}

编译输出：

test# gcc hello.c
test# ./out
str[0]:H
"Hello"[1]:e