There was a small mistake...... I solved that one

factorial/main.c

@@ -11,21 +11,21 @@
  * Created on July 8, 2018, 3:49 PM
  */
 
-#include <stdio.h>
+// Including header files
+#include <stdio.h>  
 #include <stdlib.h>
 
-/*
- * 
- */
+// Starting main function
 int main(int argc, char** argv) {
-    int i, n, fact=1;
+    int i, n, fact=1;   // initializing variables
+
     printf("Enter the number to get factorial: ");
-    scanf("%d", &n);
+    scanf("%d", &n);    // Taking inputs
+
     for(i=1;i<=n;i++){
-        fact = fact*i;
+        fact = fact*i;  // logic applied
     }
-    printf("%d ", fact);
+    printf("%d ", fact);    // printing output
 
     return 0;
 }
-

reverse_the_array/main.c

@@ -14,7 +14,7 @@
 #include <stdio.h>
 #define MAX 20
 
-/*
+
 int reversearray(int arr[], int start, int end)
 {
     int i=start;
@@ -45,8 +45,8 @@ int main(){
         printf("%d ", arr[i]);
     }
     return 0;
-}*/
+}
 
-int main(){
+// int main(){
 
-}
+// }