循环结构编写猜数字游戏

 利用循环结构，我们可以让玩家反复输入数字并比较大小，由此可以实现基本的猜数字功能。

#include
#include
using namespace std;
int main()
{int a,b=10;while (cin >> a){if (a > b){cout << "偏大" << endl;}else if (a < b){cout << "偏小" << endl;}else{cout << "Yes!" << endl;}}return 0;
}

然后我们可以给要猜的数字一点随机性，利用Windows的时间来生成一个随机数字。

srand((unsigned int )time (NULL));

int a=rand()%100+1;

#include
#includeusing namespace std;
int main()
{int num2;srand((unsigned int)time(NULL));int num1 = rand() % 100 + 1;cout << "请猜出随机生成的数字（0~100）" << endl;start = clock();while (1){cin >> num2;if (num2 > num1){cout << "很遗憾，数字偏大" << endl;}else if (num2 < num1){cout << "很遗憾，数字偏小" << endl;}else if (num2 = num1){cout << "恭喜，游戏胜利" << endl;break;}}return 0;
}

这样一个可以玩起来的猜数字游戏就完成了。

 最后，可以通过Windows的记录时间的功能来调整难度（对猜数字的时间有所限制）

#include
#include
#include
#include 
#include 
#include //windows编程头文件using namespace std;
int main()
{time_t start=0, end=0;int num2;srand((unsigned int)time(NULL));int num1 = rand() % 100 + 1;char level;cout << "请猜出随机生成的数字（0~100）" << endl << endl << endl << endl;cout << "请选择难度" << endl;cout << "A.困难(10s)  B.普通(15s)  C.简单(20s)  D.?????" << endl;cin >> level;start = clock();if (level == 'A'){cout << "请开始猜数字" << endl;while (1){cin >> num2;if (num2 > num1){cout << "很遗憾，数字偏大" << endl;}else if (num2 < num1){cout << "很遗憾，数字偏小" << endl;}else if (num2 = num1){end = clock();if ((end - start) / 1000 > 10){cout << "超时，请再试一次" << endl<<"用时"<< (end - start) / 1000 << "s" << endl;break;}else{cout << "恭喜，游戏胜利" << endl;cout << "您共用时" << (end - start) / 1000 << "s" << endl;break;}}}}else if (level == 'B'){cout << "请开始猜数字" << endl;while (1){cin >> num2;if (num2 > num1){cout << "很遗憾，数字偏大" << endl;}else if (num2 < num1){cout << "很遗憾，数字偏小" << endl;}else if (num2 = num1){end = clock();if ((end - start) / 1000 > 15){cout << "超时，请再试一次" << endl << "用时" << (end - start) / 1000 << "s" << endl;break;}else{cout << "恭喜，游戏胜利" << endl;cout << "您共用时" << (end - start) / 1000 << "s" << endl;break;}}}}else if (level == 'C'){cout << "请开始猜数字" << endl;while (1){cin >> num2;if (num2 > num1){cout << "很遗憾，数字偏大" << endl;}else if (num2 < num1){cout << "很遗憾，数字偏小" << endl;}else if (num2 = num1){end = clock();if ((end - start) / 1000 > 20){cout << "超时，请再试一次" << endl << "用时" << (end - start) / 1000 << "s" << endl;break;}else{cout << "恭喜，游戏胜利" << endl;cout << "您共用时" << (end - start) / 1000 << "s" << endl;break;}}}}else if (level == 'D'){cout << "请开始猜数字" << endl;srand((unsigned int)time(NULL));int num3 = rand() % 100+1;if (num3 <= 10){cout << "You only have " << num3 << "s " << "to finish it !!!!!" << endl;}else if(num3<=50){cout << "You will have" << num3 << " s " << "to finish it." << endl;}else{cout << "You will have enough time to finish." << endl;}while (1){cin >> num2;if (num2 > num1){cout << "很遗憾，数字偏大" << endl;}else if (num2 < num1){cout << "很遗憾，数字偏小" << endl;}else if (num2 = num1){end = clock();if ((end - start) / 1000 > num3){cout << "超时，请再试一次" << endl << "用时" << (end - start) / 1000 << "s" << endl;break;}else{cout << "恭喜，游戏胜利" << endl;cout << "您共用时" << (end - start) / 1000 << "s" << endl;break;}}}}else{cout << "What are you doing?" << endl << endl;system("Pause");cout << "It looks like you are bored with this game. " << endl;system("Pause");cout << "Let's try some new things." << endl;}return 0;
}

这样不同难度就区分出来了

甚至还可以利用随机的那段代码来实现随机时间限制。

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