File c function

The function fputs writes the string s to the output stream referenced by fp. It returns a non-negative value on success, otherwise EOF is returned in case of any error. Try the following example.

If it is not, then before proceeding, you must create this directory on your machine. When the above code is compiled and executed, it creates a new file test.

Let us read this file in the next section. The fgetc function reads a character from the input file referenced by fp. The return value is the character read, or in case of any error, it returns EOF.

The functions fgets reads up to n-1 characters from the input stream referenced by fp. It copies the read string into the buffer buf , appending a null character to terminate the string. Learn to implement data structures like Heap, Stacks, Linked List and many more!

Check out our Data Structures in C course to start learning today. Previous C program to find and replace a word in a File by another given word. Next C File Handling Question 1. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. First you have to learn the difference between a declaration and definition. A declaration tells the compiler that something, like a function, exists. A definition is, for the case of functions, the actual function implementation.

So what you do is move the definition to another file, but add a declaration in the file where the function is to be called. You then build both files together, and the compiler and linker will take care of the rest.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to move C functions into separate file? Ask Question. Asked 8 years, 2 months ago. Active 2 years, 9 months ago. Viewed 33k times. FYI: I'm using gcc. Improve this question. Andrew Andrew k gold badges silver badges bronze badges.

Just cut-and paste the function definitions into another file, then create a header with the function declarations. You'll need to include this header into your file that uses main. You'll now need to compile and link each source file together, by writing something like gcc -o program main.

See: What is a good reference documenting patterns of use of. Thanks JonathanLeffler — Andrew. Getc stands for get character, and putc stands for put character. These two functions are used to handle only a single character at a time. Skip to content. Report a Bug. Previous Prev. Next Continue. Home Testing Expand child menu Expand. SAP Expand child menu Expand. Web Expand child menu Expand.