do while loop c 2b 2b loops continuously

1//vars
2int A; //any variable will do
3
4// loop
5do {
6  A = 0; // clearing last input from last looping
7  cout << "request value for A";
8  cin >> A;
9  
10}
11while (A != 'any value other than zero');

1do {
2   // codes;
3}
4while (testExpression);

1while(/*Expression*/){
2 //Statements go here
3}