Write a program that reads a list of test scores and calculate their average. An input of EOF(by pressing CTRL+Z) for a score denotes end-of-data for the user

C Programming Language Loop control in C Language (Article) Loop control in C Language (Program)

992

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Program:

<span class="com">#include</span><span class="pln"> </span><span class="str">&lt;stdio.h&gt;</span><span class="pln">
</span><span class="com">#include</span><span class="pln"> </span><span class="str">&lt;stdlib.h&gt;</span><span class="pln">

</span><span class="kwd">int</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"> n</span><span class="pun">,</span><span class="pln"> sum</span><span class="pun">,</span><span class="pln"> score</span><span class="pun">;</span><span class="pln">
	</span><span class="kwd">float</span><span class="pln"> average</span><span class="pun">;</span><span class="pln">
	sum </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class="pun">;</span><span class="pln">
	n </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class="pun">;</span><span class="pln">
	printf</span><span class="pun">(</span><span class="str">"\n Enter test scores one by one(EOF to quit): "</span><span class="pun">);</span><span class="pln">
	</span><span class="kwd">while</span><span class="pun">(</span><span class="pln">scanf</span><span class="pun">(</span><span class="str">"%d"</span><span class="pun">,</span><span class="pln"> </span><span class="pun">&amp;</span><span class="pln">score</span><span class="pun">)</span><span class="pln"> </span><span class="pun">!=</span><span class="pln"> EOF</span><span class="pun">)</span><span class="pln">
	</span><span class="pun">{</span><span class="pln">
		sum </span><span class="pun">+=</span><span class="pln"> score</span><span class="pun">;</span><span class="pln">
		n</span><span class="pun">++;</span><span class="pln">
	</span><span class="pun">}</span><span class="pln">
	average </span><span class="pun">=</span><span class="pln"> </span><span class="pun">(</span><span class="kwd">float</span><span class="pun">)</span><span class="pln">sum </span><span class="pun">/</span><span class="pln"> n</span><span class="pun">;</span><span class="pln">
	printf</span><span class="pun">(</span><span class="str">"\n The average is %f"</span><span class="pun">,</span><span class="pln"> average</span><span class="pun">);</span><span class="pln">
	
     getch</span><span class="pun">();</span><span class="pln">
	</span><span class="kwd">return</span><span class="pln"> </span><span class="lit">0</span><span class="pun">;</span><span class="pln">
</span><span class="pun">}</span>

Output:

 Enter test scores one by one(EOF to quit): 10
20
30
40
^Z

 The average is 25.000000

Explanation:

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