Calling a function from a library by command line arguments

Hello everyone,

I want to do the following in C Language:
- Program takes 2 arguments by command line arguments: first argument is library name, and second is function name from that library. (I know how to do that)
-The program then includes the library as

Code:

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#include <library_name>

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and also calls the function which has a function signature as

Code:

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double function(double argument)

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. What is a way that could do this task? How to get the library and function to work by getting them from argv[]?
- Read all double values from input and apply the function to all the values. E.g: sin(0). (Can do that if I know how to get the function by using argv[])


What I have done is that I tried getting the library include tag as a string and convert it to executable code but apparently it is impossible in C to do such thing.
Any idea will be highly appreciated! Thanks!

Which OS and compiler are you using?

I am using Ubuntu, running gcc compiler

dlopen(3) - Linux man page

void *dlopen(const char *filename, int flag);
Open your library

void *dlsym(void *handle, const char *symbol);
Look up a symbol, cast it to a suitable function pointer

int dlclose(void *handle);
Close when you're done

Er

That's it.

That's a great idea! But just a silly question, how would I use the function with some values after getting it by *dlsym?

Function Pointers in C and C++ - Cprogramming.com