Read char array from keyboard, get its length and concatenate two strings : cin « Development « C++ Tutorial

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3. cin

#include <iostream>
#include <string.h>

using std::cout;       
using std::cin;

int main() 
{
  char firststring[40],secondstring[40],thirdstring[40];
  int size;

  cout << "Please enter a word \n";
  cin.getline(firststring,40); 

  cout << "Please enter another word  \n";
  cin.getline(secondstring,40);
  size = strlen(firststring);

 
  strcat(firststring,secondstring);

  cout << "The length of the first string you entered is" << size << "\n";
  cout << "Both strings you entered are " << thirdstring<< "\n";
  return 0;
}

Please enter a word
word
Please enter another word
word
The length of the first string you entered is4
Both strings you entered are  ?