Merge pull request DHEERAJHARODE#2709 from ROHIT8759/main

Add a armstrong.c  file

Author: DHEERAJHARODE

AREA_OF_A_CIRCLE.c

@@ -0,0 +1,9 @@
+# include<stdio.h>
+//AREA OF A CIRCLE 
+int main() {
+    float r;
+    printf("REDIUS:-");
+    scanf("%f", &r);
+    printf("AREA - %f", 3.14 * r * r );
+    return 0;
+}

Armstrong.c

@@ -0,0 +1,25 @@
+#include<stdio.h>
+#include<math.h>
+int main() {
+int n,d=0,r,s=0,t;
+printf("Enter a no- ");
+scanf("%d",&n);
+t=n;
+while (n>0)
+{
+  n=n/10;
+  d=d+1;
+} n=t;
+while (n>0)
+{
+   r=n%10;
+   printf("%d", d);
+   s=s+pow(r,d);
+   n=n/10;
+} n=t;
+if (n==s)
+{
+    printf("in %d is Armstrong",n);
+} else
+    printf("in %d is not Armstrong",n);
+}