Question

我对编程很新，很抱歉，如果我说的话没有意义！我目前正在尝试制作一个程序，并发现自己陷入了一个小问题。我制作了一个名为choice，choice[0] = one，choice[1] = two的阵列当我向用户询问某些事情时。

我希望能够让用户从阵列中挑选出他们想要的东西

cout << "Which would you like? Enter '0' for one, enter '1' for two " << endl;
cin >> choice

我理解cin >> choice部分是错误的，但我不知道该放什么，任何建议都会很棒，谢谢！

好的一些示例代码：

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

int main()
{
string choice[2], userchoice;

choice[0] = "Red";
choice[1] = "Blue";

cout << "Type '0' to choose red, type '1' to choose blue" << endl;
cin >> userchoice;
cout << "You chose " << choice[userchoice] << endl;
}

我希望它能打印出“你选择红色”或“你选择蓝色”，只需输入“0”或“1”

Answer 1

您希望输入成为数组的索引，如下所示：

size_t index;
cout << "Which would you like? Enter '0' for one, enter '1' for two " << endl;
cin >> index;
cout << "\nYou chose: " << choice[index] << endl;

Answer 2

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

string arr[5] = { "one" , "two" , "three" , "four" , "five" };

string returnArrayPos( int pos )
{
    if( pos >= 0 && pos < ( sizeof( arr ) / sizeof( *arr ) ) )
        return arr[pos];
    else
        return "Wrong Index!";
}

int main() {
    int pos = 0;

    cin >> pos;
    cout << returnArrayPos( pos ) << endl;

    return 0;
}

为您的问题提供更高级的解决方案。并保存输入错误的索引。

Answer 3

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

int main()
{
string choice[2];
int userschoice;

choice[0] = "Red";
choice[1] = "Blue";

cout << "Type '0' to choose red, type '1' to choose blue" << endl;
cin >> userschoice;
if(userschoice == 0)
{
cout << "You chose " << choice[0] << endl;
}
else if(userschoice == 1)
{
cout << "You chose " << choice[1] << endl;
}
}

Answer 4

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

int main()
{
string choice[2];
int userchoice;

choice[0] = "Red";
choice[1] = "Blue";

cout << "Type '0' to choose red, type '1' to choose blue" << endl;
cin >> userchoice;
if(userchoice>1) cout<<"Sorry my vocabulary isn't large enough..";
else
cout << "You chose " << choice[userchoice] << endl;
return 0;}

C ++：从数组中挑选出一些东西

4 个答案: