单片机编程：用4X4键盘任意输入一个小于120s的数，开始倒计时，到0时，蜂鸣器会响，按下停止按钮

#include
#include
voidMerge(int*a,intlow,intmid,inthigh){
inti=low,j=mid+1,k=0;
int*temp=(int*)malloc((high-low+1)*sizeof(int));
while(i<=mid&&j<=high)
a[i]<=a[j]?(temp[k++]=a[i++]):(temp[k++]=a[j++]);
while(i<=mid)
temp[k++]=a[i++];
while(j<=high)
temp[k++]=a[j++];
memcpy(a+low,temp,(high-low+1)*sizeof(int));
free(temp);
}
voidMergeSort(int*a,intn){
intlength;
for(length=1;lengthinti;
for(i=0;i+2*length-1<=n-1;i+=2*length)
Merge(a,i,i+length-1,i+2*length-1);
if(i+length<=n-1)//尚有两个子文件，其中后一个长度小于length
　Merge(a,i,i+length-1,n-1);
}
}
intmain(){
intn;
cin>>n;
int*data=new
int[n];
if(!data)
exit(1);
intk=n;
while(k--){
cin>>data[n-k-1];
}
clock_ts=clock();
MergeSort(data,n);
clock_te=clock();
k=n;
while(k--){
cout<}
cout<cout<<"thealgrothemused"<deletedata;
return0;
}