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c:stdlib.h:sizeof [2024/02/16 01:04] (current) |
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+ | {{keywords>wiki library source code example reference}} | ||
+ | ===== sizeof ===== | ||
+ | <code c> | ||
+ | #include <stdlib.h> | ||
+ | |||
+ | int sizeof(VALUE); | ||
+ | </code> | ||
+ | sizeof operator returns the number of bytes to be reserved for a variable or a data type. | ||
+ | |||
+ | ===== C Sourcecode Example ===== | ||
+ | <code c> | ||
+ | #include <stdio.h> /* including standard library */ | ||
+ | #include <stdlib.h> | ||
+ | //#include <windows.h> /* uncomment this for Windows */ | ||
+ | |||
+ | |||
+ | int main(void){ | ||
+ | |||
+ | printf("int: %d bytes\n", sizeof(int) ); | ||
+ | printf("Hello World: %d bytes\n", sizeof("Hello World") ); | ||
+ | |||
+ | return 0; | ||
+ | } | ||
+ | |||
+ | </code> | ||
+ | |||
+ | ==== Output ==== | ||
+ | |||
+ | Output: | ||
+ | user@host:~$ ./sizeof | ||
+ | int: 4 bytes | ||
+ | Hello World: 12 bytes | ||
+ | |||