Program to show swap of two no's without using third variable

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Program:

<span class="com">// Program to show swap of two no's without using third variable</span><span class="pln">
</span><span class="com">// Author Atnyla Developer</span><span class="pln">

</span><span class="com">#include</span><span class="str">&lt;stdio.h&gt;</span><span class="pln">
</span><span class="com">#include</span><span class="str">&lt;conio.h&gt;</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">b</span><span class="pun">;</span><span class="pln">
 
printf</span><span class="pun">(</span><span class="str">"enter value for a &amp; b: "</span><span class="pun">);</span><span class="pln"> 
scanf</span><span class="pun">(</span><span class="str">"%d%d"</span><span class="pun">,&amp;</span><span class="pln">a</span><span class="pun">,&amp;</span><span class="pln">b</span><span class="pun">);</span><span class="pln">
a </span><span class="pun">=</span><span class="pln"> a</span><span class="pun">+</span><span class="pln">b</span><span class="pun">;</span><span class="pln">
b </span><span class="pun">=</span><span class="pln"> a</span><span class="pun">-</span><span class="pln">b</span><span class="pun">;</span><span class="pln">
a </span><span class="pun">=</span><span class="pln"> a</span><span class="pun">-</span><span class="pln">b</span><span class="pun">;</span><span class="pln">
printf</span><span class="pun">(</span><span class="str">"after swapping the value of a &amp; b: %d %d \n"</span><span class="pun">,</span><span class="pln">a</span><span class="pun">,</span><span class="pln">b</span><span class="pun">);</span><span class="pln">
 
</span><span class="pun">}</span>

Output:

Output 1 
enter value for a & b: 2  3
after swapping the value of a & b: 3 2
Press any key to continue . . .

Output 2 
enter value for a & b: 12
56
after swapping the value of a & b: 56 12
Press any key to continue . . .

Explanation:

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