C++/Console/cin

A Closer Look at the I/O Operators

<source lang="cpp">

1. include <iostream>

using namespace std; int main() {

 float f;
 char str[80];
 double d;
 cout << "Enter two floating point numbers: ";
 cin >> f >> d;
 cout << "Enter a string: ";
 cin >> str;
 cout << f << " " << d << " " << str;
 return 0;

}

 </source>

cin and cout work with char array

<source lang="cpp">

1. include <iostream>

using namespace std; int main () {

  char name[ 80] = {"J", "e", "f", "f", "/0" };
  cout << "Enter your name: ";
  cin >> name;
  cout << "Your name is " << name;
  return 0;

}

 </source>

cin Object"s getline Function

<source lang="cpp">

1. include <iostream>

using namespace std; int main () {

  char name[ 80] = {"J", "e", "f", "f", "/0" };
  cout << "Enter your name: ";
  cin >> name;
  cout << "Your name is " << name;
  return 0;

}

 </source>

cin to read

<source lang="cpp">

1. include <iostream>

using namespace std; int main () {

  int testScore1, testScore2, testScore3;
  cout << "Enter test score #1: ";
  cin >> testScore1;
  cout << "Enter test score #2: ";
  cin >> testScore2;
  cout << "Enter test score #3: ";
  cin >> testScore3;
  cout << "Test score #1: " << testScore1 << endl;
  cout << "Test score #2: " << testScore2 << endl;
  cout << "Test score #3: " << testScore3 << endl;
  return 0;

}

 </source>

cin to read float in C++

<source lang="cpp">

1. include <iostream>

using namespace std; int main() {

  double x, y;
  cout << "Enter two floating-point values: ";
  cin >> x ;
  cin >> y;
  cout << "The average of the two numbers is: " << (x + y)/2.0 << endl;
  return 0;

}

 </source>

Filling an Array with a Maximum Number of Characters

<source lang="cpp">

1. include <iostream>

using namespace std; int main() {

   char buffer[80] = {"\0"};
   cout << "Enter the string: ";
   cin.get(buffer, 79);       // get up to 79 or newline
   cout << "Here"s the buffer:  " << buffer << endl;
   return 0;

}

 </source>

Unformattwd Input/Output

<source lang="cpp">

1. include <iostream>
2. include <string>

using namespace std; string header ="Unformatted Input"; int main() {

  string word, rest;
  cout << header << "Press <return> to go on" << endl;
  cin.get();                  // Read the new line without saving.
                              
  cout << "\nEnter a sentence! End with <!> and <return>." << endl;
  cin >> word;                // Read the first word
  getline( cin, rest, "!");   // read a line up to the character !
  cout << "The first word:   " << word  << endl
       << "Remaining text: " << rest << endl;
  return 0;

}

 </source>

Use the getline function to read the user"s input and assign that input to the character array

<source lang="cpp">

1. include <iostream>

using namespace std; int main () {

  char name[80] = {"J", "e", "f", "f", "/0" };
  cout << "Enter your name: ";
  cin.getline(name, 80);
  cout << "Your name is " << name;
  return 0;

}

 </source>

Using the cin and cout Objects with Arrays

<source lang="cpp">

1. include <iostream>

using namespace std; const int MAX = 3; int main () {

  char grades[MAX];
  for (int i = 0; i < MAX; i++)
  {
     cout << "Enter grade for test #" << i + 1 << ":";
     cin >> grades[i];
  }
  return 0;

}

 </source>