如何运行多行cin？

Question

我认为您应该使用cin.getline？

我试图询问降雨的月份和数量，然后在他们输入之后，我想要第二个月的降雨和数量，然后再询问第三个月。在那之后，我简单地取这些平均值。

但是当我运行代码时，您只能输入第一个月的降雨量和降雨量，然后它只给出以下两个问题，而您却无法回答。

#include <iostream>
#include <iomanip>

int main()
{
double r1, r2, r3, rA;
int m1, m2, m3;


std::cout << "Average Rainfall Calculator\n";

std::cout << "Please enter your first month followed by the amount of rain in inches:\n";
std::cin >> m1;
std::cin >> r1;

std::cout << "\nPlease enter your second month followed by the amount of rain in inches:\n";
std::cin >> m2;
std::cin >> r2;

std::cout << "\nPlease enter your third month followed by the amount of rain in inches:\n";
std::cin >> m3;
std::cin >> r3;

rA = (r1 + r2 + r3) / 3;

std::cout << "The amount of rainfall for: " << m1 << ", " << m2 << ", and " << m3 << "is " << std::setprecision(2) << std::fixed << rA << "inches of rain.\n";

}

我认为您应该使用cin.getline？我想问问降雨的月份和数量，然后在他们输入后，我想要第二个月的降雨和数量，然后再次询问...

Answer 1

m1，m2和m3是数字，但您可能输入了文本。试试：