Cria método para consertar as porcentagens

tps/fonte/musica.cpp

@@ -1,4 +1,5 @@
 #include <string.h>
+#include <math.h>
 typedef struct {
     char id[30];
     char name[200];
@@ -94,5 +95,9 @@ void read_release_date(Musica *music, char field[]) {
     music->release_date[7] = '/';
 }
 
+double handle_percentage(double value) {
+    return ceil(value) == value ? value / 100 : value;
+}
+
 }