gan, ane lagi latian bikin program pake C, ini baris kodenya

#include <stdio.h>

void main ()

{

 int umur, cup, coklat, vanilla, stroberi, jumcup, jumcoklat, jumvanilla, jumstroberi, jumlah, total, diskon, totdiskon, masukan, kembali;

 char nama[20];



 cup = 15000;

 coklat = 50000;

 vanilla = 60000;

 stroberi = 55000;



 printf ("+=================+

|Aguchan Cake Shop|

+=================+");



 printf ("



Masukkan nama Anda: ");

 scanf ("%s", nama); fflush (stdin);



 printf ("Masukkan umur Anda: ");

 scanf ("%d", &umur; fflush (stdin);



 printf ("



+=================+

|Aguchan Cake Shop|

+=================+");



 printf ("



Selamat datang di Aguchan Cake Shop, %s!

Silakan masukkan jumlah cake yang ingin Anda Beli",nama);



 printf ("



Cupcake Special @Rp15.000: ");

 scanf ("%d",&jumcup; fflush (stdin);



 printf ("Cake Cokelat @Rp50.000: ");

 scanf ("%d", &jumcoklat; fflush (stdin);



 printf ("Cake Buah Vanilla @Rp60.000: ");

 scanf ("%d", &jumvanilla; fflush (stdin);



 printf ("Cake Strawberry @Rp55.000: ");

 scanf ("%d", &jumstroberi; fflush (stdin);



 jumlah = jumcup + jumcoklat + jumvanilla + jumstroberi;



 total = cup*jumcup + coklat*jumcoklat + vanilla*jumvanilla + stroberi*jumstroberi;



 diskon = umur * 1000;



 totdiskon = total - diskon;



 printf ("

Jumlah cake yang Anda beli= %d", jumlah);

 printf ("

Total harga= %d", total);

 printf ("

Diskon= %d", diskon);

 printf ("

Total harga setelah diskon= %d", totdiskon);

 

 printf ("



Masukkan jumlah uang Anda= ");

 scanf ("%d",masukan); fflush (stdin);



 kembali = masukan - totdiskon;



 printf ("Kembalian= %d", kembali);



 printf ("



Terimakasih telah berbelanja di Aguchan Cake Shop ");





 getchar ();

}

di situ dibilang ada error "The variable 'masukan' used without being initialized."

ane bingung, soalnya kan udah ane taro tuh variable masukan di int atas..

bantuin yah gan mastah