Why, after selecting the amount of the contribution, would suggest a new amount of contribution instead of a menu display?

[magpie]

In selecting 1 paragraph, the user is requested to show the current value of the contribution. When selecting two, insert a new amount of contributions accordingly. If you choose 3, you're leaving the program.

The code I used:

//Program writed with error when choose 1 after it progrum should output menu instead entering new sum of conribution
#include <iostream>
#include <string>
using namespace std;
int main() {

int contribution;

char choose;
cout &lt;&lt; "Hello I don't know what I'm doing but still" &lt;&lt; endl;
cout &lt;&lt; "Enter sum of contribution in bank:";
cin &gt;&gt; contribution;
cout &lt;&lt; endl;
while (true) {
    system("cls");
    cout &lt;&lt; "What you what to do" &lt;&lt; endl;
    cout &lt;&lt; "1.Show sum of contribution" &lt;&lt; endl;
    cout &lt;&lt; "2.Change sum of contribution" &lt;&lt; endl;
    cout &lt;&lt; "3.Exit" &lt;&lt; endl &lt;&lt; endl;
    cin &gt;&gt; choose;

    switch (choose) {
    case '1':
        cout &lt;&lt; "Sum of cintribution:" &lt;&lt; contribution &lt;&lt; endl;
        system("pause");
    case '2':
        cout &lt;&lt; "Enter new sum of contribution:";
        cin &gt;&gt; contribution;
        cout &lt;&lt; "New sum of of contrubution is " &lt;&lt; contribution &lt;&lt; endl;
    case '3':
        cout &lt;&lt; "Have a good day!";
        break;
    default:
        cout &lt;&lt; "choose 1 2 or 3";
    }
}

}

Why, after selecting the amount of the contribution, would suggest a new amount of contribution instead of a menu display?

[Nykeriab]

because case We need to split through break Otherwise they'll be carried out one by one.

    case '1':
        cout << "Sum of cintribution:" << contribution << endl;
        system("pause");
        break;
    case '2':
        cout << "Enter new sum of contribution:";
        cin >> contribution;
        cout << "New sum of of contrubution is " << contribution << endl;
        break;
    case '3':
        cout << "Have a good day!";
        break;
    default:

By the way, 3 There is no exit and at least there is a need to implement:

while (true) {
    // ...
    bool isExit == false;
    switch (choose) {
    case '3':
        cout << "Have a good day!";
        isExit = true;
        break;
    default:
        cout << "choose 1 2 or 3";
    }
    if (isExit == true)
        break;
}