我正在尝试编写一个接受 3 个不同数组的函数。这些数组的类型分别为字符串、 double 和 double 。该函数将用数据填充这些数组,然后将它们返回给 main。但是,我不确定将什么声明为函数的返回类型,因为所有数组都不包含相同的数据类型。下面列出了接受数组作为参数的函数
void additems(string arry1[], double arry2[], double arry3[], int index)
{
/************************* additems **************************
NAME: additems
PURPOSE: Prompt user for airport id, elevation, runway length. Validate input and add to 3 seperate parallel arrays
CALLED BY: main
INPUT: airportID[], elevation[], runlength[], SIZE
OUTPUT: airporID[], elevation[], runlength[]
****************************************************************************/
//This function will prompt the user for airport id, elevation, and runway length and add them to
//separate parallel arrays
for (int i=0; i<index; i++)
{
cout << "Enter the airport code for airport " << i+1 << ". ";
cin >> arry1[i];
cout << "Enter the maximum elevation airport " << i+1 << " flys at (in ft). ";
cin >> arry2[i];
while (arry2[i] <= 0)
{
cout << "\t\t-----ERROR-----";
cout << "\n\t\tElevation must be greater than 0";
cout << "\n\t\tPlease re enter the max elevation (ft). ";
cin >> arry2[i];
}
cout << "Enter the longest runway at the airport " << i+1 << " (in ft). ";
cin >> arry3[i];
while (arry3[i] <= 0)
{
cout << "\t\t-----ERROR-----";
cout << "\n\t\tRunway length must be greater than 0";
cout << "\n\t\tPlease re enter the longest runway length (ft). ";
cin >> arry3[i];
}
cout << endl;
}
return arry1, arry2, arry3;
}
预先感谢您考虑我的问题
最佳答案
您不需要返回数组,因为它们已被函数修改。当您将数组传递给这样的函数时,数组是通过引用传递的。通常数据类型按值传递(即 复制),但数组的处理方式有点像指针。
因此只需返回 void
,或者如果您愿意,您可以返回某种类型的值来指示成功(如果合适的话)。您可能希望返回一个整数来表示输入了多少条记录(如果用户可以选择输入少于 index
条记录)。
关于C++ 如何从一个函数返回多个不同类型的数组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13061613/