CODEWITHSUNDEEP
c++stringinputcin
user3348713
user3348713

Reputation: 5

C++ storing cin input and skipping others

I'm having trouble skipping certain inputs.

int main(){
  string input;
  string lastName;
  string firstName;
  int age;
  int streetNum;
  string streetName;
  string town;
  string zipCode;
  float balance;

later on 

Update(lastName, firstName, age, streetNum, streetName, town, zipCode, balance);
}

The idea is, if the user enters nothing (just hits enter) the value should stay the same and move to the next input.

void Update(string &lastname, string &firstname, int &age, int &streetnum, string &streetname, string &town, string &zipcode, float &balance){
  cout << "Update the following, enter nothing to leave the same: " << endl;
  string input;
  size_t sz;

  cout << "Last name: ";
  cin >> input;
  if (!input.empty()) { lastname = input; }

  cout << "First name: ";
  cin >> input;
  if (!input.empty()) { firstname = input; }

  cout << "Age: ";
  cin >> input;
  if (!input.empty()) { age = stoi(input, &sz); }

  cout << "Street number: ";
  cin >> input;
  if (!input.empty()) { streetnum = stoi(input, &sz); }

  cout << "Street name: ";
  cin >> input;
  if (!input.empty()) { streetname = stoi(input); }

  cout << "Town name:";
  cin >> input;
  if (!input.empty()) { town = input; }

  cout << "ZipCode: ";
  cin >> input;
  if (!input.empty()) { zipcode = input; }

  cout << "Balance: ";
  cin >> input;
  if (!input.empty()) { balance = stof(input); }

}

All my attempts have failed to skip the input if the user only hits enter.

Upvotes: 0

Views: 189

Answers (1)

Christophe
Christophe

Reputation: 73366

The problem with cin for your code is:

  • it ignores the blanks, and newline (enter) is a blank
  • it uses the blanks as separator of value so "Baker street" would be read as two strings, the second being taken for the town.

Consider use of getline() into a string (and eventually stringstream to parse further the result received): 

   getline (cin, input);    // instead of cin>>input;

By the way, streetname isn't an integer, is it ? ;-)

Upvotes: 1

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