Why Does \'cin\' Only Read the First Word in C ?

"cin" Only Reads the First Word in C : Clarifications and Solutions

In the provided code snippet, the cin stream operator is being used to read input into the str character array. However, it only reads the first word of the input, leading to incomplete string retrieval.

Why cin Behaves This Way

By default, cin reads characters sequentially and delimits input based on whitespace characters (e.g., spaces, tabs). When it encounters a whitespace character, it considers the input sequence complete and moves to the next input.

Solution 1: cin.getline() for Char Arrays

To read an entire line of input, we can use the cin.getline() function instead of cin. It takes two parameters: the char array to read into and the size of the array to ensure buffer overflow doesn't occur.

<code class="c++">char str[100];
cin.getline(str, sizeof str);</code>

Solution 2: getline() for std::string

If you're using C 11 or later, you can leverage the std::string type and use the getline() function:

<code class="c++">std::string str;
std::getline(cin, str);</code>

Modern Compiler Recommendation

It's highly recommended to upgrade from Turbo C 4.5 to a more modern compiler. Visual Studio Express is a free option for Windows that offers improved language support and features.

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