sizeof() operator, Returns the size of a variable.

C Programming Language Operators and Enums in C Language (Article) Operators and Enums in C Language (Program)

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Program:

<span class="com">//Assignment operator </span><span class="pln">

</span><span class="com">// sizeof() operator</span><span class="pln">

</span><span class="com">#include</span><span class="str">"stdio.h"</span><span class="pln">
</span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
   </span><span class="kwd">int</span><span class="pln"> a </span><span class="pun">=</span><span class="pln"> </span><span class="lit">4</span><span class="pun">;</span><span class="pln">
   </span><span class="kwd">short</span><span class="pln"> b</span><span class="pun">;</span><span class="pln">
   </span><span class="kwd">double</span><span class="pln"> c</span><span class="pun">;</span><span class="pln">
   </span><span class="kwd">int</span><span class="pun">*</span><span class="pln"> ptr</span><span class="pun">;</span><span class="pln">

   </span><span class="com">/* example of sizeof operator */</span><span class="pln">
   printf</span><span class="pun">(</span><span class="str">"Line 1 - Size of variable a = %d\n"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">a</span><span class="pun">)</span><span class="pln"> </span><span class="pun">);</span><span class="pln">
   printf</span><span class="pun">(</span><span class="str">"Line 2 - Size of variable b = %d\n"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">b</span><span class="pun">)</span><span class="pln"> </span><span class="pun">);</span><span class="pln">
   printf</span><span class="pun">(</span><span class="str">"Line 3 - Size of variable c= %d\n"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">c</span><span class="pun">)</span><span class="pln"> </span><span class="pun">);</span><span class="pln">


</span><span class="pun">}</span>

Output:

Line 1 - Size of variable a = 4
Line 2 - Size of variable b = 2
Line 3 - Size of variable c= 8
Press any key to continue . . .

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