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

C Programming Language Overview of C Language (Article) Overview of C Language (Program)

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Program:

<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: \n"</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">
	printf</span><span class="pun">(</span><span class="str">"Before swapping the value of a=%d &amp; b=%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">
	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=%d &amp; b=%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:

enter value for a & b:
2  3
Before swapping the value of a=2 & b=3
After swapping the value of a=3 & b=2
Press any key to continue . . .

Explanation:

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