如何打印隨機 cout 語句？

Question

基本上，我有五個不同的cout輸出，我想從五個中隨機打印其中一個。

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

int main(){

        string name[2] = {"Nao","Shilla"};
        string behaviour[4] = {"recognise","detect","avoid","replace"};
        string position[4] = {"above","below","left","right"};
        string pronoun[3] = {"I","you","they"};
        string object[4] = {"car","person","dog","diamond"};
        string texture[3] ={"smooth","dimpled","rough"};

        srand(time(NULL));

        cout <<name[rand() % 2] << " " <<behaviour[rand() % 4]<< " " <<object[rand() % 4] <<endl;
        cout <<name[rand() % 2] << " " <<behaviour[rand() % 4]<< " "<<texture[rand() % 3] << " " <<object[rand() % 4] <<endl;
        cout <<name[rand() % 2] << " " <<behaviour[rand() % 4]<< " " <<position[rand() % 4] <<endl;
        cout <<pronoun[rand() % 3] << " " <<behaviour[rand() % 4]<< " " <<object[rand() % 4] <<endl;
        cout <<pronoun[rand() % 3] << " " <<behaviour[rand() % 4]<< " " <<position[rand() % 4] <<endl;

}

Answer 1

您基本上需要對數組執行相同的操作，只需生成一個 0-4 之間的數字，然后使用 switch 語句選擇要執行的一個。

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

int main(){

        string name[2] = {"Nao","Shilla"};
        string behaviour[4] = {"recognise","detect","avoid","replace"};
        string position[4] = {"above","below","left","right"};
        string pronoun[3] = {"I","you","they"};
        string object[4] = {"car","person","dog","diamond"};
        string texture[3] ={"smooth","dimpled","rough"};

        srand(time(NULL));

        switch(rand() % 5)
        {
            case 0:
                cout <<name[rand() % 2] << " " <<behaviour[rand() % 4]<< " " <<object[rand() % 4] <<endl;
            break;
            case 1:
                cout <<name[rand() % 2] << " " <<behaviour[rand() % 4]<< " "<<texture[rand() % 3] << " " <<object[rand() % 4] <<endl;
            break;
            case 2:
                cout <<name[rand() % 2] << " " <<behaviour[rand() % 4]<< " " <<position[rand() % 4] <<endl;
            break;
            case 3:
                cout <<pronoun[rand() % 3] << " " <<behaviour[rand() % 4]<< " " <<object[rand() % 4] <<endl;
            break;
            case 4:
                cout <<pronoun[rand() % 3] << " " <<behaviour[rand() % 4]<< " " <<position[rand() % 4] <<endl;
        }

}