what does the extension .h mean and why aren’t we just making a cpp file . why a different file for main function and hash table
Why is the file saved as hashtable.h and not as hashtable.cpp
Hello @Anchal,
.h: a header file (to be included with a preprocessor #include directive). Contains stuff that is normally deemed to be shared with other parts of your code, like function prototypes, #define’d stuff, extern declaration for global variables (oh, the horror) and the like.
Technically, you could put everything in a single file. A whole C program. million of lines. But we humans tend to organize things. So you create different C files, each one containing particular functions. That’s all nice and clean. Then suddenly you realize that a declaration you have into a given C file should exist also in another C file. So you would duplicate them. The best is, therefore, to extract the declaration and put it into a common file, which is the .h
You can refer to the following link for a detailed explanation about header files:
Header Tutorial
Hope, this would help.
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