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C

Find the Circumference and Area of a Circle

/* Write a program to compute the circumference and area of a circle with a given user-input radius*/

#include <stdio.h>
#include <math.h>

int main(void) {
  printf("This program will calculate the circumference and area of a circle from it's radius.\n");

  double radius;
  printf("Please enter a radius: ");
  scanf("%lf", &radius);

  double circumference = 2 * M_PI * radius;
  printf("The circumference of a circle with the radius of %lf is: %lf\n", radius, circumference);

  double area = M_PI * pow(radius, 2);
  printf("The area of a circle with the radius of %lf is: %lf", radius, area);

  return 0;
}
https://snipt.net/embed/57a6840dd53d396f84452e50205abe9f/
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57a6840dd53d396f84452e50205abe9f
c
C
20
2019-08-19T09:46:43
True
False
False
Aug 08, 2019 at 07:18 AM
/api/public/snipt/342989/
find-the-circumference-and-area-of-a-circle
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="cm">/* Write a program to compute the circumference and area of a circle with a given user-input radius*/</span> </span><span id="L-2"><a name="L-2"></a> </span><span id="L-3"><a name="L-3"></a><span class="cp">#include</span> <span class="cpf">&lt;stdio.h&gt;</span><span class="cp"></span> </span><span id="L-4"><a name="L-4"></a><span class="cp">#include</span> <span class="cpf">&lt;math.h&gt;</span><span class="cp"></span> </span><span id="L-5"><a name="L-5"></a> </span><span id="L-6"><a name="L-6"></a><span class="kt">int</span> <span class="nf">main</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span> <span class="p">{</span> </span><span id="L-7"><a name="L-7"></a> <span class="n">printf</span><span class="p">(</span><span class="s">&quot;This program will calculate the circumference and area of a circle from it&#39;s radius.</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span> </span><span id="L-8"><a name="L-8"></a> </span><span id="L-9"><a name="L-9"></a> <span class="kt">double</span> <span class="n">radius</span><span class="p">;</span> </span><span id="L-10"><a name="L-10"></a> <span class="n">printf</span><span class="p">(</span><span class="s">&quot;Please enter a radius: &quot;</span><span class="p">);</span> </span><span id="L-11"><a name="L-11"></a> <span class="n">scanf</span><span class="p">(</span><span class="s">&quot;%lf&quot;</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">radius</span><span class="p">);</span> </span><span id="L-12"><a name="L-12"></a> </span><span id="L-13"><a name="L-13"></a> <span class="kt">double</span> <span class="n">circumference</span> <span class="o">=</span> <span class="mi">2</span> <span class="o">*</span> <span class="n">M_PI</span> <span class="o">*</span> <span class="n">radius</span><span class="p">;</span> </span><span id="L-14"><a name="L-14"></a> <span class="n">printf</span><span class="p">(</span><span class="s">&quot;The circumference of a circle with the radius of %lf is: %lf</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">radius</span><span class="p">,</span> <span class="n">circumference</span><span class="p">);</span> </span><span id="L-15"><a name="L-15"></a> </span><span id="L-16"><a name="L-16"></a> <span class="kt">double</span> <span class="n">area</span> <span class="o">=</span> <span class="n">M_PI</span> <span class="o">*</span> <span class="n">pow</span><span class="p">(</span><span class="n">radius</span><span class="p">,</span> <span class="mi">2</span><span class="p">);</span> </span><span id="L-17"><a name="L-17"></a> <span class="n">printf</span><span class="p">(</span><span class="s">&quot;The area of a circle with the radius of %lf is: %lf&quot;</span><span class="p">,</span> <span class="n">radius</span><span class="p">,</span> <span class="n">area</span><span class="p">);</span> </span><span id="L-18"><a name="L-18"></a> </span><span id="L-19"><a name="L-19"></a> <span class="k">return</span> <span class="mi">0</span><span class="p">;</span> </span><span id="L-20"><a name="L-20"></a><span class="p">}</span> </span></pre></div> </td></tr></table>
--- 
+++ 
@@ -0,0 +1,20 @@
+/* Write a program to compute the circumference and area of a circle with a given user-input radius*/
+
+#include <stdio.h>
+#include <math.h>
+
+int main(void) {
+  printf("This program will calculate the circumference and area of a circle from it's radius.\n");
+
+  double radius;
+  printf("Please enter a radius: ");
+  scanf("%lf", &radius);
+
+  double circumference = 2 * M_PI * radius;
+  printf("The circumference of a circle with the radius of %lf is: %lf\n", radius, circumference);
+
+  double area = M_PI * pow(radius, 2);
+  printf("The area of a circle with the radius of %lf is: %lf", radius, area);
+
+  return 0;
+}