File Processing

In here I was taught of how i make programs that can process files, or basically manipulate files haha.

Here's how I open a file,

1. first we need to input a variable to represent the file.

Syntax:

FILE *fp;

2. And we open the file. for example, we want to write on a file called "output.txt" in data D.

Syntax:

fp = fopen("D:\\output.txt","w");   //w here means write

3. We use "fprintf" to print inside the txt file.

Syntax:

fprintf(fp,"Hello World!");

And the result is, there will be a text "Hello World!" inside output.txt in Data D.

Here's how I read it,

1. Input the variable like this.

Syntax:

fp = fopen("D:\\output.txt","r");   //r here means read

2. you can scan the data in the output.txt file by using "fscanf". Here's how it's done.

Syntax:

fscanf(fp,"%s",a);

//if we print a, it will be "Hello".

With all these lectures, it is said that file can be processed and manipulated through programs.