How to write input statement in c++

C provides a variety of input statements: cin statement: reads from standard input and stores it in a variable cin.get() function: reads and returns a character cin.getline() function: reads a line of text And stored in a string variable

Input statement in C

C language provides a variety of input methods, the most commonly used iscin Statement:

cin statement

cin statement reads input from the standard input stream and stores it in the specified variable. Its basic syntax is as follows:

<code class="cpp">cin >> variable_name;</code>

where variable_name is a variable name used to store values ​​read from the standard input stream.

Example: Read an integer and store it in the num variable:

<code class="cpp">int num;
cin >> num;</code>

cin.get() function

cin.get() The function reads a character from the standard input stream and returns that character. Its basic syntax is as follows:

<code class="cpp">char ch = cin.get();</code>

where ch is a character variable used to store characters read from the standard input stream.

Example: Read a character and store it in the ch variable:

<code class="cpp">char ch;
cin.get(ch);</code>

cin.getline() function

cin.getline() The function reads a line of text from the standard input stream (until a newline character is encountered) and stores it in the specified string variable. Its basic syntax is as follows:

<code class="cpp">string line;
cin.getline(line, max_length);</code>

Where:

• line is a string variable used to store text read from the standard input stream.
• max_length is an integer specifying the maximum length of a line of text to be read.

Example: Read a line of text and store it in the line variable:

<code class="cpp">string line;
cin.getline(line, 100); // 最多读取 100 个字符</code>

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