最近剛開始自學，請問這段程式碼問題出在哪裡呢？
執行時輸入第一個number按enter後，就會跳出停止運作
懇請解惑，謝謝!
#include<stdio.h>
int main(void){
int number1,number2,temp;
printf("please enter the first number:");
scanf("%d",number1);
printf("please enter the second number:");
scanf("%d",number2);
temp=number1;
number1=number2;
number2=temp;
printf("經過兩數交換後first number=%d,second number=%d",number1,number2);
return 0;
}