rt，全局变量m的值一直是3，求大佬指出蒟蒻哪里写错了。

#include<bits/stdc++.h>
#include<conio.h>
#include<windows.h>
using namespace std;
#define s(x,y) ((rand()%((y)-(x)))+(x))
//#define f(x,y) (pow(2,s(x,y)))
#define cls system("cls")
#define ring printf("\a")

int a[6][11],top[6],n,k[4],m,e,h,score;
char s[1010][1010]= {"zeroth","first","second","third","fourth","fifth","sixth","seventh","eighth","ninth","tenth"};

int f(int x,int y);//set the randow value of the new card
void HideCursor();//hide the cursor
void warn();//tell something to player
void pnum(int p);//print n by nth
void print();//print the map
void print2();//print the score and the cards
int print3();//tell the player what should he do now
int check(int p);//check if line p has 2048
int calc(int p);//check if line p could have new card
int put(int p,int k);//put k into line p

int f(int x,int y){
	int sr=s(1,4+3*(y-1));
	if(1<=sr && sr<=4) return 2;
	if(5<=sr && sr<=7) return 4;
	if(8<=sr && sr<=10) return 8;
	if(11<=sr && sr<=13) return 16;
	if(14<=sr && sr<=16) return 32;
	if(17<=sr && sr<=19) return 64;
}

void HideCursor() {
	HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
	CONSOLE_CURSOR_INFO CursorInfo;
	GetConsoleCursorInfo(handle, &CursorInfo);//获取控制台光标信息
	CursorInfo.bVisible = false; //隐藏控制台光标
	SetConsoleCursorInfo(handle, &CursorInfo);//设置控制台光标状态
}

void warn() {
	printf("Don\'t type any keys except numbers when you are playing!\n\n");
	printf("Type ESC to end the game.%d\n\n\n",m);
}

void pnum(int p) {
	printf("%s",s[p]);
}

void print() {
	for(int i=1; i<=n; i++) {
		printf("Line %02d(%d): ",i,top[i]);
		if(top[i])
			for(int j=1; j<=top[i]; j++) {
				if(j==1) printf("[%4d]",a[i][j]);
				else printf(" [%3d]",a[i][j]);
			}
		else printf("There\'s no cards there.");
		printf("\n");
	}
	printf("\n");
}

void print2() {
	printf("Your score: %d.\n\n",score);
	for(int i=1; i<=e; i++) {
		if(i==1) printf("The next card: ");
		else {
			printf("The next ");
			pnum(i);
			printf(" card: ");
		}
		printf("[%d].\n",k[i]);
	}
	printf("\n");
}

int print3() {
	printf("Please input which line you will put [%d].\n",k[1]);
	//scanf("%d",&h);
Line:
	do {
		h=getch()-'0';
		int h2=h+'0'-'a'+1;
		if(1<=h2 && h2<=n) h=h2;
		if(h==-21) exit(0);
	} while(1>h || h>n);
	int t=put(h,k[1]);
	if(t==2) return 1;
	if(t==1) return 0;
	goto Line;
}

int check(int p) {
	for(int i=1; i<=top[p]; i++) {
		if(a[p][i]==2048) {
			for(int j=1; j<=top[p]; j++)
				if(j!=i) score+=a[p][j];
			top[p]=0;
			return 1;
		}
	}
	return 0;
}

int calc(int p) {
	int r=1,g=0;
	while(a[p][top[p]]==a[p][top[p]-1] && top[p]>1) {
		cls;
		ring;
		warn();
		print();
		printf("Your score: %d.\n\n",score);
		Sleep(500);
		top[p]--;
		a[p][top[p]]*=2;
		score+=r*a[p][top[p]];
		r++;
		if(a[p][top[p]]>pow(2,m) && m<6) g=1;
		int q=check(p);
		if(q==1) return g;
	}
}

int put(int p,int k) {
	if(top[p]<10) {
		a[p][++top[p]]=k;
		a[p][0]+=k;
		int u=calc(p);
		if(u) return 2;
		return 1;
	}
	return 0;
}

int main() {
	HideCursor();
	srand((unsigned)time(NULL));
	n=5;
	m=2;
	e=3;
	score=0;
	for(int i=1; i<n; i++) k[i]=f(1,m);
	while(1) {
		cls;
		ring;
		warn();
		k[e]=f(1,m);
		print();
		print2();
		int l=print3();
		if(l) m++;
		for(int i=2; i<=n; i++) k[i-1]=k[i];
		//getch();
	}
	return 0;
}