How to Find a Word in a File Using C++

In this post, we will explore how to find a word or substring in a string using C++. The `String` class in Java provides two methods, `indexOf()` and `contains()`, which can be used to find a word in a sequence of characters.

To demonstrate the concept, let's consider a simple example. Suppose we have a text file named 'fname.txt' containing some content. We want to count the total number of words that exist in this text file using C++. To achieve this, we will use the `fstream` library and its keyword `ifstream`.

Here is a sample code implementation:

```

#include

using namespace std;

int main() {

int word = 1; // Will not count first word so initial value is 1

ifstream fin('fname.txt'); // Opening text file

fin.seekg(0, ios::beg); // Bring position of file pointer to beginning of file

// Code implementation goes here...

return 0;

}

```

In this code snippet, we are opening the 'fname.txt' file using `ifstream` and setting the file pointer to the beginning of the file using `seekg`. The `word` variable is initialized with a value of 1, which will not count the first word. We can modify this value based on our requirements.

Another keyword used in this code snippet is `seekg`, which is used to change the location of the file pointer. This can be set at the beginning, ending, or current location of the file. Additionally, it's essential to always remember to close a file after reading or writing content using it.

In summary, the file handling implemented in this article uses the `fstream` library and its keyword `ifstream`. The provided code example demonstrates how to count the total number of words in a text file using C++.

How to find word in file c++