How to use gets function in c++

The gets() function in C is used to read a string from standard input and store it in a character array. It reads the string until a newline character is encountered or the end of file is encountered. Its usage includes: declaring a character array to store strings. Use the gets() function to read the string. Verify the return value to ensure the read was successful.

Usage of gets() function in C

gets() function is used to read characters from standard input string and store it in the specified character array. It is similar to the scanf() function, but has no format specifier and reads until a newline character is encountered or the end of file is encountered.

Syntax:

<code class="cpp">char *gets(char *str);</code>

Parameters:

• str: ​​ points to the character array Pointer to store the read string.

Return value:

• Returns a pointer to the character array when the string is successfully read.
• Return NULL when the end of file is encountered.

Usage:

To use the gets() function, follow these steps:

1. Declare a character array whose Large enough to hold the string to be read.
2. Use the gets() function to read a string from standard input.
3. Verify the return value to ensure the read was successful.

Example:

<code class="cpp">#include <iostream>

using namespace std;

int main() {
  char str[100];

  cout << "Enter a string: ";
  gets(str);

  if (str != NULL) {
    cout << "The string you entered is: " << str << endl;
  } else {
    cout << "Error reading the string." << endl;
  }

  return 0;
}</code>

Note:

• gets() function does not check the buffer overflow, so care must be taken when reading strings.
• For user input, it is recommended to use safer input functions such as getline() or fgets().
• gets() function does not remove newlines, so you need to manually remove it when using it.

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