In C, sizeof operator works on following kind of operands:
1) type-name: type-name must be specified in parentheses.
sizeof (type-name) |
2) expression: expression can be specified with or without the parentheses.
sizeof expression |
The expression is used only for getting the type of operand and not evaluated. For example, below code prints value of i as 5.
#include <stdio.h> int main() { int i = 5; int int_size = sizeof(i++); printf("
size of i = %d", int_size); printf("
Value of i = %d", i); getchar(); return 0; } |
Output of the above program:
size of i = depends on compiler
value of i = 5
References:
http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V40G_HTML/AQTLTCTE/DOCU0015.HTM
http://www.gnu.org/software/gnu-c-manual/gnu-c-manual.html#The-sizeof-Operator
This article is attributed to GeeksforGeeks.org
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