I decided today to re-write a simple calculator I wrote a while back in Java, to C. This time I'm trying to make the calculator a bit more advanced with a few command line options. Among many a -v option for verbose. When the -v option is set I want the output from the calculations (the -c option start the loop) to be written to a file. But there's a few problems. I'm using the getopt() function to retrieve the options set. If I use ./calc -vc (or -v -c) the verbose mode is on, and the calculation loop start. But if I do ./calc -cv (or -c -v), only the calculation loop starts. Why? The real problem here is I don't know how to write the input/output from the loop to a file. Should I create a buffer? How do I tell (check) the loop that the -v option is set?
Here's some of the code (I have cut most of it off, if more is needed let me know):A part of the calculate(), which loops until either Q or q is pressed:Code:while((argument = getopt(argc, argv, "hvcV")) != -1) { switch(argument) { case 'h': help(); break; case 'v': printf("verbose mode on\n"); verbose(); break; case 'c': printf("options:\t+ - / *\n"); calculate(); break;Any suggestions? Thanks in advance.Code:switch(option) { case '+': case '1': printf("first value:\t"); first = userInput(); printf("second value:\t"); second = userInput(); total = first + second; printf("total:\t\t%.3f\n", total); break;