1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | #include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
int main(int argc, char* argv[]) {
char* s = "abc"; // We think of s as a "string" but s is actually the address of the
// first character in that string.
// REMINDER: The string at s is read-only.
printf("s == \"%s\"\n", s); // Type of s is char*.
printf("s[0] == '%c'\n", s[0]); // Type of s[0] is char.
printf("*s == '%c'\n", *s); // Type of *s is char.
// If s is a char*, then *s is a char.
// *s is equivalent to s[0]
// If s is a char*, then s[0] is a char.
printf("s[1] == '%c'\n", s[1]); // Type of s[1] is char.
printf("*(s + 1) == '%c'\n", *(s + 1)); // Type of *(s + 1) is char.
// s[♣] is equivalent to *(s + ♣).
// s[1] is equivalent to *(s + 1).
// *(s + 1) is a char.
printf("s[2] == '%c'\n", s[2]); // Type of s[1] is char.
printf("*(s + 2) == '%c'\n", *(s + 2)); // Type of *(s + 1) is char.
// REMINDER: You cannot write to a string on the data segment (read-only portion).
// When you initialize a char* with a string literal ("…"), that will be the address
// of a string on the data segment (read-only portion).
return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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