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 36 37 38 | #include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
// sizeof(EXPRESSION) tells you the number of bytes needed to store an object/variable
// of the type of EXPRESSION.
// - sizeof(1) tells you the number of bytes needed to store an int.
// └ because 1 is an int.
//
//_____________________________________
// DO NOT USE THIS WAY OF USING SIZEOF
// sizeof(TYPE) tells you the number of bytes needed to store an object/variable of
// type TYPE.
int main(int argc, char* argv[]) {
int n = 5;
printf("sizeof(n) ==== %zd\n", sizeof(n));
printf("sizeof(int) == %zd ... BUT DO NOT USE THIS FORM\n", sizeof(int));
printf("\n");
int* a_n = &n; // &n means "address of n"
printf("sizeof(a_n) === %zd\n", sizeof(a_n));
printf("sizeof(int*) == %zd ... BUT DO NOT USE THIS FORM\n", sizeof(int*));
printf("\n");
char ch = 'A';
printf("sizeof(ch) ==== %zd\n", sizeof(ch));
printf("sizeof(char) == %zd ... BUT DO NOT USE THIS FORM\n", sizeof(char));
printf("\n");
char* s = "XYZ";
printf("sizeof(s) ====== %zd\n", sizeof(s));
printf("sizeof(char*) == %zd ... BUT DO NOT USE THIS FORM\n", sizeof(char*));
return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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