Added C program to find the closest power of 2 for a number

Author: jindalabhishek1

closestpowerof2.c

@@ -0,0 +1,25 @@
+//Program for printing closest of 2 of a number.
+
+#include<stdio.h>
+#include<math.h>
+
+int main()
+{
+    int num,a,b,c,d=0;
+    scanf("%d",&num);
+    for(b=31;b>=0;--b)
+    {
+        c=num>>b;
+        if(c&1)
+        {
+            d++;
+            if(d>1)
+            {
+                num=num-pow(2,b);
+            }
+        }
+    }
+    printf("%d",num);
+    return 0;
+}
+//not working for negative no.