如何終止控制檯？

這裏是一個新手。我有以下幾點：如何終止控制檯？

#include<iostream> 
#include<string> 
#include<iomanip> 
#include<cmath> 
#include<stdlib.h> 

using namespace std; 

int main() { 
    int choice; 
    double radius, length, width, base, height; 
    const double PI = 3.14159; 

    cout << ":Geometry Calculator:\n\n"; 
    cout << "1. Calculate the Area of a Circle \n"; 
    cout << "2. Calculate the Area of a Rectangle \n"; 
    cout << "3. Calculate the Area of a Triangle \n"; 
    cout << "4. Quit\n"; 
    cout << "4. Please pick number: " ; 
    cin >> choice; 

    switch (choice) { 
    case 1: 
     double aCirc; 
     cout << "Enter the RADIUS of your Circle: "; 
     cin >> radius; 
     aCirc = PI * pow(radius, 2); 
     cout << "The AREA of your CIRCLE IS: " << aCirc; 
     break; 
    case 2: 
     double aRec; 
     cout << "Enter the LENGTH and WIDTH of your Rectangle (seprate your numbers with a space): "; 
     cin >> length >> width; 
     aRec = length * width; 
     cout << "The AREA of your Rectangle is: " << aRec; 
     break; 
    case 3: 
     double aTri; 
     cout << "Enter the BASE and HEIGHT of your Triangle (separate your numbers with a space): "; 
     cin >> base >> height; 
     aTri = (base * height)/2; 
     break; 
    case 4: 
     exit(); 
    default: 
     cout << "\n You entered an Invalid Number GoodBye No Number" << endl; 
    } 


    return 0; 
}

我試圖終止控制檯，而用戶按「4」我尋找各種可能的功能，但是我相信我利用它們不正確，我認爲這是正確的後，我在另一個網站看到它，但它沒有工作，任何人都可以幫忙？感謝您的時間和專業知識。

來源

2016-10-04 Victor Martins

您的意思是，當用戶按「4」程序終止，而不是當用戶按「4」和「返回」？ –

是的，這是對的，抱歉的混亂。 –