Passing values to command line from a function-C language

Question

I am trying to find out how to pass output value of a function into command line in a C file. The name of the variable is "Cext", "Cabs". The default behavior of the program is to create a folder which contains C files in which the output is printed. The code where I have to edit is as follows:

In the lines 922-925,

CCfile=FOpenErr(fname,"w",ONE_POS);
PrintBoth(CCfile,"Cext\t= "GFORM"\nQext\t= "GFORM"\n",Cext,Cext*inv_G);
PrintBoth(CCfile,"Cabs\t= "GFORM"\nQabs\t= "GFORM"\n",Cabs,Cabs*inv_G);
FCloseErr(CCfile,F_CS,ONE_POS);

What changes I should make? So i can get the value on the command line and than store it in an array. Any links/ text to read or sample code would be highly appreciated? I have previously looked at these links but i still haven' figured it out

1. Pass arguments into C program from command line
2. Arguments to main in C
3. https://www.geeksforgeeks.org/command-line-arguments-in-c-cpp/
4. https://techvidvan.com/tutorials/command-line-arguments-in-c/

Answer 1

strncpy(fname_cs,"dev/null",400)

had to write this line of code multiple times in the c file, so nothing is printed and than in the shell, i transferred the data to a variable before it is deleted.