c++制作小游戏

话不多说，直接上代码！

#include 
#include 
#include 
using namespace std;
char s;
char gxia='A',choose;
int rand1,numn;
bool flag=true;
int cishu=0;	
void menu()
{
	system("color 3D");
	cout<'C');
}
void nac() {
	system("cls");
	system("color BF");
	cout<gxia||choose<'A'); 
}
void ddd() {
	MessageBox(GetForegroundWindow(),"游戏中会随机生成一个数,你要找出这个n数(猜的次数只有10次)(第五关重来几次n有几率次数减少)","帮助",1);
}
void num1() {
	system("cls");
	system("color 4E");
	rand1=rand()%31+20;
	do {
		cin>>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<>numn;
		cishu++;
		if(numnrand1) cout<<"太大了！！！n";
		if(cishu>=10) flag=false;
	} while(numn!=rand1&&cishu<10);
	if(flag) {
		cout<<"恭喜你猜中了!"<