最近刚开始自学，请问这段程式码问题出在哪里呢？
执行时输入第一个number按enter后，就会跳出停止运作
恳请解惑，谢谢!
#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("经过两数交换后first number=%d,second number=%d",number1,number2);
return 0;
}