Dear respected programmers. Please could you help me (again) on how to put the following code into functions for my program. I have read on-line and understand how functions work but when I do it myself it all goes pear shaped/wrong(I am such a noob). Please could you help with how to for example to write the code below into functions.(like opening the input file).

My attempt:

void outputFile(int argc, char **argv)
{   
    /* Check that the output file doesnt exist */

    if (stat(argv[argc-1], &inode) != -1)
    {
        printf("Warning: The file %s already exists. Not going to overwrite\n", argv[argc-1]); 
        return -1;
    }

    /*Opening ouput files*/

    file_desc_out = open(argv[i],O_CREAT | O_WRONLY | O_EXCL , S_IRUSR|S_IWUSR);
    if(file_desc_out == -1)
    {
        printf("Error: %s cannot be opened. \n",argv[i]);           //insted of argv[2] have pointer i. 
        return -1;
    }
}

Any help on how I would now reference to this in my program is appreciated thank you. I tried: ouputfile(but I cant figure out what goes here and why either).