c++ - 选择两个字符串之一输出？

Question

我想知道如何让程序随机输出两个字符串之一。 很难解释，但这是我的例子:

#include <iostream>
#include <string>
using namespace std;

int main()
{
string age;

cout << "How old are you?" << endl;
cin >> age;

if (age < 0)
{
cout << "Invalid age" << endl;
}
     if (0 >= age && age <<= 3)
     {
     cout << "Oh you're just a baby" << endl;
     //               OR (random)
     cout << "Time to take a nap!" << endl;
     }

return 0;
}

我想编程输出“哦，你只是个婴儿”或“该睡午觉了!”每当用户输入 0 到 3 之间的数字时随机出现。有人可以解释一下吗？

Answer 1

尝试:

#include <cstdlib>
...
...
...
/* initialize random seed: */
srand(time(NULL));

/* generate secret number: */
int ss = rand() % 2;
if (ss) {
    cout << "Oh you're just a baby" << endl;
} else {
    cout << "Time to take a nap!" << endl;
}