在整数数组中输入时如何在 C++ 中按下“输入”时中断循环

Question

I have this loop, where arr is an integer array.

for(int i=0; i<=counter;i++)
    {
        cin>>arr[i];
    }

I'm giving input like this

2 4 6 7

I want when enter is pressed after 7, just break this loop.

---

I think it can be done with something like

if(cin.get()=="\n")

But I can't understand how to implement it here in this code.

Answer 1

If you wanted to exit your for loop when you press the Enter Key. You would need to check the given input before putting it in your array.

And if it is equal to '\\n' , leave the for loop with break .

for (int i = 0; i <= counter; i++) {
    // Check if user pressed the Enter Key
    if(std::cin.peek() == '\n') {
        // Leave the for loop
        break;
    }
    std::cin >> arr[i];
}

To ensure that the input doesn't get cleared from cin.get() we can instead use cin.peek() .