![]() I have not figured out how to handle the 2nd part of the string if its characters do not result in integer when processed by the atoi() command. In some cases, there is a second part to the string that is supposed to get converted to a 16 bit integer. I welcome any thoughts on how to handle this any "better" than I already have. I check the first part of the string for specific sets of characters, and if I don’t get an “acceptable” value, all the data gets ignored and the user is prompted to re-enter the data. I’m now trying to handle cases where the data is entered by an unsympathetic user. The data is stored in a character string and by using pointers, strtok(), strcmp(), atoi() and atof() I’m able to process the data (if entered “correctly”) and get the instructions I need. Here is a summary of all the options, grouped by type.Įxplanations are in the following sections.I’m processing data sent to my Arduino Uno that is manually entered via the com port. The binary and decimal byte size prefixes. International standards for the full listing and explanation of Refer to the NIST, IEC, and other relevant national and SuchĪrguments are designated by byte-size in the following text. "GB" and "GiB" for gigabyte and gigibyte, and so on. Kibibyte, respectively, "MB" and "MiB" for megabyte and mebibyte, ![]() Multiple of bytes such as "kB" and "KiB" for kilobyte and Hexadecimal integers followed by a byte size suffix designating a Size threshold of some sort may be arbitrarily large decimal or Hexadecimal arguments mustīegin with the 0x prefix. ![]() Numeric arguments must typically be small unsignedĭecimal or hexadecimal integers. Unless documented otherwise, an argument can be either numeric orĪ string. Some options take one or more arguments typically separatedĮither by a space or by the equals sign ( =) from the option name. ![]() This manual documents only one of these two These have both positive and negative forms the negative form of Many options have long names starting with -f or with -W-forĮxample, -fmove-loop-invariants, -Wformat and so on. Also, the placement of the -l option is significant. More than once, the directories are searched in the order Several options of the same kind for example, if you specify -L Options may not be grouped: -dv is very different from -d -v. Options have multi-letter names therefore multiple single-letter The gcc program accepts options and file names as operands. Machine -gcc when cross-compiling, or machine -gcc- version to run a The usual way to run GCC is to run the executable called gcc, or Language, you can use that option with all supported languages. The description for a particular option does not mention a source Language (usually C++), the explanation says so explicitly. Useful for C programs when an option is only useful with another Most of the command-line options that you can use with GCC are Of these are not documented here, since you rarely need to use Yet other options control the assembler and linker most Some options control the preprocessor and others the compiler Other options are passed on to one or more stages of processing. When you invoke GCC, it normally does preprocessing, compilation,Īssembly and linking. g++ accepts mostly the same options as gcc. Only the most useful options are listed here see below for the
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