View difference between Paste ID: zb7aM679 and UWdRtN1x

 #include <stdio.h>
 
 double power(double n)
 {
       int q;
       double c=2;
-      for (q=n; q>1; q--) {c*=n;}
+      for (q=n; q>1; q--) {c=2*c;}
       return c;
 }
 
 int main()
 {
     double n, output;
     scanf("%lf",&n);
-    output=power(2,n);
+    output=power(n);
     printf("%lf",output);
     return 0;
 }